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  Topic Review (Newest First)
Jun 25th, 2010 11:51 am
Razmataz
Re: Windscreen cracked!!

Quote:
Originally Posted by fpmlt
Lee, Took a Vulture at lower speed, hurt it more that it did me. I was surprised.
You've got to move once in awhile so those vultures don't think your dead!
Jun 25th, 2010 11:00 am
shuster
Re: Windscreen cracked!!

I have the 09 LT and let the dealer do all the work. Last month my windscreen cracked where it is fastened to the the lift arms...comment from the dealer was "we must have tightened the screws beyond recommendation"... I like my new windscreen...
Jun 25th, 2010 4:08 am
vernvernvern
Re: Windscreen cracked!!

Quote:
Originally Posted by rkimmel2
I am not going to say you are wrong. I am asking that anyone out there with a real road experience like the above chime in. I have had objects hit my CB shield with no effect. On the other hand, never a Turkey!
YEP, I hit a turkey at 40 mph or so and the CB windshield drew blood on my chest and arms.I have a post some where on this forum. I had on a mesh jacket, but now I ride with a BMW tough jacket. Mirrors came loose too. NO MORE CB's for me. I put the original poly back on and only use water with Basic H ,which makes water wetter, to clean it and the whole bike. It's a Shaklee product. My poly isn't perfect, but it isn't cloudy and is now 7 years old on my '03 LT and just rolled up 90,000 miles. YeeHaa.

We're risking it all just by riding motorcycles so guess adding a wind screen that can turn into daggers is no big deal.

It's a free country we live in so far. God help us!

Vern
Jun 25th, 2010 1:50 am
huggacurve
Re: Windscreen cracked!!

G'day all

If I could chime in here with my 2 bits.

I recently purchased the 08 LT and it was fitted with a ZTechnik VStream screen. The screen is perfect for me.

However...upon close inspection while cleaning the bike I noticed several cracks emanating from the mounting holes. One of the cracks had already had a small hole drilled to stop the crack from travelling.

After reading the previous posts about Poly vs acrylic, I am a bit confused as to why these cracks are there. They certainly look like cracks that would occur in acrylic.

Here are some pics of the screen. (I hope this attachment thing works)
May 31st, 2010 1:04 pm
Sit
Re: Windscreen cracked!!

I put on a Ztechnik screen. After reading reviews here and basically getting a head ache from it, just decided that some I read about that included size of rider, that it would work for me. The local dealer also had it in stock and I liked the looks of it. Have taken it for a quick spin up the highway and a few notes.

Boy the thing is big compared to the Euro screen! I normally ran the Euro screen full upright. With the V stream, no need, I seem to have found a happy spot with it in a middle position that allows me to look over the screen and does not cause any buffeting. All the way up, there is a bit of back pressure and I am looking full through the screen. This may work well for cold or rain, will have to see how it does. As summer has not arrived here, imagine I will get a taste of rain riding with it come Wednesday. Screen all the way down, a bit less air than the Euro, but not much. Will have to see how this makes things in the hot weather. Kind of like that the screen now has adjustment both ways so I can adapt to the weather. Have not gone out two up yet, so don't know how my wife will like it yet. She had some buffeting with the Euro full up and liked it down a bit, but I did not.

As for clarity, like looking through a car windshield, no issues or distortion. As for size, I am 6' tall with a 34 inseam. Run with the stock seat in the high position with a Shoei helmet. Very quiet behind the screen, and still looking over the top of it, can keep the helmet shield open with very very minor wind to the face. Full up, could smoke behind it if I smoked.
May 31st, 2010 12:50 pm
mwnahas
Re: Windscreen cracked!!

Quote:
Originally Posted by LAF
Very good information and I for one thank you for taking the time for us.

I would say it is enough proof for me, no science about it!!!!!!!!!!!!!!

I would like to know what shield you put on, specifics if you could, and impressions if you could.

I always say not to old to learn and I sure got schooled here. Like I said I have drilled hundreds of holes in PC and put lag bolts through it to cover ornate stained glass in churches and historic buildings and never any problems. Never used locktite

Thanks for taking the time for us.
Interesting. Chemicals can attack and crack your Poly windshield.
May 31st, 2010 12:42 pm
LAF
Re: Windscreen cracked!!

Quote:
Originally Posted by Sit
The results are in. After putting on my V Stream, woohoo, works great, I took the old, now FUBAR, BMW Euro screen and drilled two holes in it in a section that was not affected by the old cracks etc. I put the same size bolts in the holes with washers on the back side (to offer some tension) and nuts and tightened them as tight as I could with a screwdriver, I really got these as tight as I could. The only difference, on one side I put the dreaded locktite.

Sure enough, checked it this morning, less than 12 hours later and the locktite side is cracked all to hell. The other side, nothing. Took the bolt out and what did I find? Locktite had traveled up the threads and the screen was actully wet/oily under the washer. I only put locktite on the tip of the bolt. So I think this pretty much shows (rather unscientifically) that locktite travels and once in contact with Poly, the impossible happens and it will crack.

Don't use locktite!!
Very good information and I for one thank you for taking the time for us.

I would say it is enough proof for me, no science about it!!!!!!!!!!!!!!

I would like to know what shield you put on, specifics if you could, and impressions if you could.

I always say not to old to learn and I sure got schooled here. Like I said I have drilled hundreds of holes in PC and put lag bolts through it to cover ornate stained glass in churches and historic buildings and never any problems. Never used locktite

Thanks for taking the time for us.
May 31st, 2010 11:57 am
Sit
Re: Windscreen cracked!!

The results are in. After putting on my V Stream, woohoo, works great, I took the old, now FUBAR, BMW Euro screen and drilled two holes in it in a section that was not affected by the old cracks etc. I put the same size bolts in the holes with washers on the back side (to offer some tension) and nuts and tightened them as tight as I could with a screwdriver, I really got these as tight as I could. The only difference, on one side I put the dreaded locktite.

Sure enough, checked it this morning, less than 12 hours later and the locktite side is cracked all to hell. The other side, nothing. Took the bolt out and what did I find? Locktite had traveled up the threads and the screen was actully wet/oily under the washer. I only put locktite on the tip of the bolt. So I think this pretty much shows (rather unscientifically) that locktite travels and once in contact with Poly, the impossible happens and it will crack.

Don't use locktite!!
May 29th, 2010 10:08 am
LAF
Re: Windscreen cracked!!

Quote:
Originally Posted by Sit
That is a great idea. I may try to trim off the lower part of the shield and reshape the remaining parts to make a very small screen just for giggles. Whether I do that or not, I should have plenty to play with. Was thinking to go one better, drill two holes, but screw through one and tighten into a nut or wood or something, in the other hole same thing, but put a bit of locktite on it and tighten. If I have read various links correctly, it was most likely not the locktite itself, but the locktite and slight pressure on the screen, so I will try to create that again with a control next to it to see if I get a run.
Great you are as curious as I am on this. I mean when you read information on interactions it makes sense but who would have thought?

As I said I have had a bunch of CB screens on my bike. from -2 to -6, clear, and blue tint, and yes including some mistakes on their part. One thing I can say in all the years I have dealt with them they have been top notch, pictures were enough in my case and they allowed me to keep the old screen! I have to say they were most excellent to deal with and especially because I wanted a -6.

Anyway sorry on your windshield issue the only consolation is a lot of us have replaced the OEM shield.

The rest of the debate on PC or Acrylic you have seen a bit of in this thread and you can search and read.

Like I said a lot of us use Acrylic because that manufacturer has a large selection, multiple designs, and we are pleased at how they function. If I found a PC shield designed like the CB I would buy it.
May 28th, 2010 10:20 pm
Sit
Re: Windscreen cracked!!

Quote:
Originally Posted by LAF
I still am skeptical on the locktite but after you get a new one how about drilling a hole up in the middle somewhere, put a piece of duct tape on one side, lay it down and put a drop of locktite in it and see what happens?
That is a great idea. I may try to trim off the lower part of the shield and reshape the remaining parts to make a very small screen just for giggles. Whether I do that or not, I should have plenty to play with. Was thinking to go one better, drill two holes, but screw through one and tighten into a nut or wood or something, in the other hole same thing, but put a bit of locktite on it and tighten. If I have read various links correctly, it was most likely not the locktite itself, but the locktite and slight pressure on the screen, so I will try to create that again with a control next to it to see if I get a run.
May 28th, 2010 1:03 pm
fpmlt
Re: Windscreen cracked!!

Lee, I have to agree with the locktite's capability to destroy 'plastic'. My son-in-law ruined a fairing piece on the V-Strom using locktite. There really was no question about what caused the damage.
As far as bird strikes, I took a Robin in the chest at 60 (HD, no windshield), with no problem. Took a Vulture at lower speed, hurt it more that it did me. I was surprised.
May 28th, 2010 12:56 pm
LAF
Re: Windscreen cracked!!

Quote:
Originally Posted by Sit
I know it is all in the wording, but I think we have shown a poly shield will crack, run, split, break, what ever without modification. Using locktite is not a modification to the shield, it is an environmental factor affecting the integrity of the poly, most likely weakening it, alllowing any stress the screen is under, that it may normally be able to withstand, to negatively affect the integrity of the poly.

As for photos, kind of hard to get ones with the screen on the bike, but at great risk to my own fingernails, I pulled off the chrome covers to take a few shots of mine. The cracks are hard to see, so I highlited the ones I could see in the photos with red. Note the right side actually has a chunk missing. And you can't tell in the photos, but the rubber doo-dads are still there.
They say a picture is worth a thousand words and this one is for sure.

I have never seen Lexan or PC of any kind loose a chunk. I have lost chunks, but never seen a chunk from PC from a run or pressure. Now I played up to 3/8" but most of our applications were 1/4"- 1/8". If you cover like a 3 window door with 1/8" Lexan and have a deal bolt on it, they will need to bring most of the door down to get in.

One of two things, it is not PC or Lexan, or it has been attacked by the LockTite.

I still am skeptical on the locktite but after you get a new one how about drilling a hole up in the middle somewhere, put a piece of duct tape on one side, lay it down and put a drop of locktite in it and see what happens?

At any rate you need a new shield and I hope you enjoy it. I use the CB #2 -6 and love it. It has taken some hits from stones and such at highway speeds and has held. A bird probably, but a big Pheasant, Crow, Turkey Vulture, or whatever large birds are in your area, probably not. I have had some close calls, but most of those from birds are side on from my experience.

At any rate my face shield is PC and if I hit a large bird at 70-80 MPH probably my concern is going to be on accessing staying up right, correcting, or getting ready to bail.

Weather my shield holds or not, that unexpected impact would be the true issue for me.
May 28th, 2010 12:33 pm
RonKMiller
Re: Windscreen cracked!!

Quote:
Originally Posted by sheldan2
from Ceebailey.

A calibrated torque wrench in INCH POUNDS is required for proper installation. For well nut applications tighten to 5-8 inch pounds. All other applications tighten between 15-18 inch pounds.
Over torquing of the windshield may cause Stress cracks in the windshield.
Oh man - talk about CYA.....

I wonder how many guys own a very special torque wrench with values that low - AND are spot on accurate. I own one - and it's a good one too.

I think I've used it maybe two times in the ten years I've owned it!

I can just hear the phone call:

"Hello"

"Hi, yeah my new windshield cracked, I'm not very happy about it"

"Well, did you torque it to exactly 15 to 18 inch pounds as mentioned in our FAQ's?"

"Umm, no."

"Thank you for calling customer service, have a nice day."

CLICK.
May 28th, 2010 11:55 am
seahabit
Re: Windscreen cracked!!

[QUOTE= I'm surprised you can but it in California without a hazmat license..

Not only can we get it here, we have our medical cards and are allowed to smoke it.
May 28th, 2010 11:48 am
deanwoolsey
Re: Windscreen cracked!!

If you look at the Loctite MSDS, two of the primary ingredients are Sacharin and Super Glue. I'm surprised you can but it in California without a hazmat license..


May 28th, 2010 10:04 am
sheldan2
Re: Windscreen cracked!!

from Ceebailey.

A calibrated torque wrench in INCH POUNDS is required for proper installation. For well nut applications tighten to 5-8 inch pounds. All other applications tighten between 15-18 inch pounds.
Over torquing of the windshield may cause Stress cracks in the windshield.
May 27th, 2010 11:57 pm
tvguy
Re: Windscreen cracked!!

Quote:
Originally Posted by RonKMiller
sorry Ron.... no pictures. I tossed it before taking any pictures.
May 27th, 2010 11:01 pm
Sit
Re: Windscreen cracked!!

I know it is all in the wording, but I think we have shown a poly shield will crack, run, split, break, what ever without modification. Using locktite is not a modification to the shield, it is an environmental factor affecting the integrity of the poly, most likely weakening it, alllowing any stress the screen is under, that it may normally be able to withstand, to negatively affect the integrity of the poly.

As for photos, kind of hard to get ones with the screen on the bike, but at great risk to my own fingernails, I pulled off the chrome covers to take a few shots of mine. The cracks are hard to see, so I highlited the ones I could see in the photos with red. Note the right side actually has a chunk missing. And you can't tell in the photos, but the rubber doo-dads are still there.
May 27th, 2010 10:25 pm
fwkraft
Re: Windscreen cracked!!

The video that Ron has is unbelievable! I wonder if a small bird would blow through an acrylic windscreen? I've hit two in the last two years and while they've made me duck and are loud - no damage to my OEM shield. I have been thinking about something different just for the SO who complains of buffeting and know now that I will be careful in my choice...
May 27th, 2010 9:56 am
fpmlt
Re: Windscreen cracked!!

"The stock windshield was a piece of crap. Fogged all the time and was coming apart."

Maybe we should start a "Stock windshield is a POS registry"?

And then a "Stock main seals are CRAP registry"?

And, and, and - oh the possibilities!!!
May 27th, 2010 9:53 am
RonKMiller
Re: Windscreen cracked!!

Quote:
Originally Posted by LAF
Well you learn something new every day around here. It seems that a chemical can make Poly run, never seen it in my day but we never used locktite in the glazing industry.

So if that is the case then don't use locktite. Must be why new screws have it on already. Still can not see how such a small screw with a tiny drop of locktite would have enough excess to make fumes to break down poly but the science don't lie.

As Ron and I have tried to tell you you can drill a hole in polycarbonate and torque a bolt through it and it will actually flatten rather then break.

Good discussion with a great finding of this chemical reaction. Will never solve the poly acrylic debate on shields though
...also don't even THINK of peeing on your poly windshield!
May 27th, 2010 9:48 am
RonKMiller
Re: Windscreen cracked!!

Quote:
Originally Posted by Voyager
I've seen this video before and am disappointed that the poly won't stop the 9mm. :-)
It did - it bounced off...

I've seen a demo piece of 1" Lexan brand poly with all sorts of stuff shot at it.

.45, 357, .38, 9mm, .223, and three 12 gauge slugs in a tight group. The tip of the .223 barely made it through and was poking out the other side by about 1/8". The slugs made impressive holes in the entry side and a bunch of cracks radiating out from each impact site, and also blew out a small melted piece from the rear - but were firmly trapped inside.

What was most impressive is that while the slug grouping pounded the hell out of it - it did not collapse or shatter.
May 27th, 2010 9:37 am
LAF
Re: Windscreen cracked!!

Well you learn something new every day around here. It seems that a chemical can make Poly run, never seen it in my day but we never used locktite in the glazing industry.

So if that is the case then don't use locktite. Must be why new screws have it on already. Still can not see how such a small screw with a tiny drop of locktite would have enough excess to make fumes to break down poly but the science don't lie.

As Ron and I have tried to tell you you can drill a hole in polycarbonate and torque a bolt through it and it will actually flatten rather then break.

Good discussion with a great finding of this chemical reaction. Will never solve the poly acrylic debate on shields though
May 27th, 2010 9:33 am
RonKMiller
Re: Windscreen cracked!!

Quote:
Originally Posted by tvguy
I barely over tightened my OEM polycarbonate shield and cracked the shit out of it.
A nice 3 inch crack went from the left screw holes to the center.
Fortunately I had it on there temporarily while I waited for my new C. B. to arrive.

The stock windshield was a piece of crap. Fogged all the time and was coming apart.
May 27th, 2010 9:32 am
RonKMiller
Re: Windscreen cracked!!

Quote:
Originally Posted by Voyager
What crack? You said a crack wasn't possible! Make up your mind. :-)
I have.

A BMW OEM windshield won't crack - unless you are doing modifications that are not needed.

If I only had a dollar for every mistake I've seen in Clymer manuals - they are the WORST.
May 27th, 2010 9:16 am
rkimmel2
Re: Windscreen cracked!!

Quote:
Originally Posted by Voyager
It is only a big issue if something of any size hits your windshield at any speed. Anything larger than a pebble or a small bird and which is traveling more than about 30 MPH will trash an acrylic shield. Hit a crow or, heaven forbid, a turkey at 40 MPH and you will be in a world of hurt with acrylic.
I am not going to say you are wrong. I am asking that anyone out there with a real road experience like the above chime in. I have had objects hit my CB shield with no effect. On the other hand, never a Turkey!
May 27th, 2010 3:09 am
Ajlelectronics
Re: Windscreen cracked!!

I have used fibre washers for spacing the screen. Even with enthusiastic tightening, no problem at all. Just a bit fiddly to get them on the screws and hold everything in the right place. Oh yes, try not to have a screwdriver in your hand while the screen is being positioned.
May 27th, 2010 12:31 am
tvguy
Re: Windscreen cracked!!

Quote:
Originally Posted by RonKMiller

BMW OEM is polycarbonate. Impossible to crack.
I barely over tightened my OEM polycarbonate shield and cracked the shit out of it.
A nice 3 inch crack went from the left screw holes to the center.
Fortunately I had it on there temporarily while I waited for my new C. B. to arrive.

The stock windshield was a piece of crap. Fogged all the time and was coming apart.
May 26th, 2010 11:21 pm
Sit
Re: Windscreen cracked!!

I would agree at this point that it must be the fumes, the unseen fumes. I too was anal about not getting it on the screen, figured it would discolor it or something. So after carefully putting it on, and putting screws in, I of course put on the covers that would have trapped any fumes against the screen. This would all explain why several days later the un-crackable screen is cracked.

So yes, lesson learned, no lock tite on screen screws. Just go with what is already on them from the factory. I guess it goes back to the old saying, don't believe everything you read, it mentions lock tite in the Clymer manual.
May 26th, 2010 9:53 pm
spaghetti
Re: Windscreen cracked!!

I agree with you about the Loctite. I put a set of Slipstreamer clear wind wings on a 1500 Goldwing. I was very meticulous about how I mounted them. In an effort to go 110%, I put a small dab of low strength loctite on the screws. The next day when I looked at them all of the holes were cracked and the pieces were ruined.

I never ever get loctite near windshields anymore. I have not heard of anyone else doing this until now.

I am quite sure now that the loctite is a no-no on windshields, and in case you are wondering, I was very careful not to get loctite directly on the plastic. It must be the fumes.

Spaghetti
May 26th, 2010 9:22 pm
Voyager
Re: Windscreen cracked!!

Quote:
Originally Posted by RonKMiller
Excellent info - I've attached the chemicals that don't agree with polycarbonate - and the ingredients of loctite. While it has been a loooongg time since college chemistry I'll wager that there is some serious incompatibility going on here... The dimethacrylate (Super Glue) is especially curious - and a major ingredient by percentage of loctite.

...hence the possible source of the crack.
What crack? You said a crack wasn't possible! Make up your mind. :-)
May 26th, 2010 9:17 pm
Voyager
Re: Windscreen cracked!!

Quote:
Originally Posted by rkimmel2
I have considered everything you have to say and simply do not agree that this is a big issue. Maybe we need to hear from people out there who have had bad experiences with Cee Bailey shields. That could change my mind. In the meantime, there are reasons that people flock to non oem shields when they own BMWs and not all have to do with price. Lack of selection and style along with fogging, scratching and the inability to resurface them have led many to believe that they can do better. I have seen the results of people testing shields with shotgun blasts, but I would find it more convincing if everyday rocks on the road were used in the tests and showed catastrophic damage.
It is only a big issue if something of any size hits your windshield at any speed. Anything larger than a pebble or a small bird and which is traveling more than about 30 MPH will trash an acrylic shield. Hit a crow or, heaven forbid, a turkey at 40 MPH and you will be in a world of hurt with acrylic.
May 26th, 2010 9:14 pm
Voyager
Re: Windscreen cracked!!

Quote:
Originally Posted by RonKMiller
The ONLY reason I would prefer acrylic over polycarbonate is that you can polish out fine scratches. If you're careful with polycarbonate you never even have to worry about fine scratches since they usually have a silicon coating that is impregnated into the surface.

As a Commercial Pilot it absolutely drives me nutz that Cee Bailey's uses their "aircraft plastics" logo to sell dangerous products to the average motorcycle consumer. If not downright fraudulent it is certainly "strategic misrepresentation" - a marketing term used by corporate liars and charlatans to justify huge profits.
The only reason they - and others - can get away with selling this garbage is that there are no Federal Motor Safety Vehicle Safety Standards for motorcycle windshields.

Acrylic windshields ARE used on aircraft - where they are designed to be supported and surrounded by a strong metal frame. Almost all of them are a composite layered with - you guessed it - polycarbonate!

BMW has been using polycarbonate since at least 1979 - my R80/7 has one... there must be a good reason they use it when they could use much cheaper acrylic.

Did you ever consider that if your windshield shattered it could cause you to crash?

ZTechnik windshield video
I've seen this video before and am disappointed that the poly won't stop the 9mm. :-)
May 26th, 2010 8:57 pm
RonKMiller
Re: Windscreen cracked!!

Quote:
Originally Posted by mwnahas
Interesting. Chemicals can attack and crack PC

http://www.nhml.com/resources/2001/4...-thermoplastic
Excellent info - I've attached the chemicals that don't agree with polycarbonate - and the ingredients of loctite. While it has been a loooongg time since college chemistry I'll wager that there is some serious incompatibility going on here... The dimethacrylate (Super Glue) is especially curious - and a major ingredient by percentage of loctite.

...hence the possible source of the crack.
May 26th, 2010 8:18 pm
mwnahas
Re: Windscreen cracked!!

Interesting. Chemicals can attack and crack PC

http://www.nhml.com/resources/2001/4...-thermoplastic
May 26th, 2010 7:05 pm
Sit
Re: Windscreen cracked!!

Thanks to all those that have replied. I would bet to some degree that it may have been the fumes from the lock tite since the screen did not crack when I installed it and managed to do this all by itself sitting alone in the garage.

I have already purchased a V Stream, because I like the looks and reviews for it, from the local shop and will put it on this weekend, with no lock tite and plenty of rubber washers. I may mess around with the old screen and cut it off below the holes to make a very short screen and see how it does like that for giggles.

So which do you guys prefer? Synthetic or dyno oil?
May 26th, 2010 3:01 pm
rkimmel2
Re: Windscreen cracked!!

Quote:
Originally Posted by RonKMiller
The video I included at the bottom of my post shows a large rock being thrown at both windshields - just about the same size as one that got stuck between the rear tires of my dually a couple of weeks ago. I was lucky it didn't come flying out at speed and nail someone behind me.

It was wedged in so hard I had to jack up the rear, deflate both tires and use a crow bar to pry it out!

I've tried many different windshields on my two LT's in 180K. For me the (polycarbonate) V-stream has been the best, hands down. No fogging like the BMW OEM has been known to do in humid climates and much more scratch resistant. I also have noticed that I'm not constantly fussing with the height adjustment all the time. It seems to have (for me anyway) a sweet spot.
I have seen videos of staged situations demonstrating your point. Also read articles on this site supporting your point. I like Cee Bailey shields and trust mine in everyday situations as do many if not most of the people who have to replace their stock shields. This reminds me of the helmet debates. You have seen them; "buy a $100.00 helmet if you have a $100.00 head". Turns out that the data suggests that the more absorbent cheap poly helmets may be better for your head in a crash. None the less, I find the more comfortable and often more expensive helmets worth the risk.
May 26th, 2010 2:52 pm
fpmlt
Re: Windscreen cracked!!

So Ron, am I reading this right? That OEM windshield won't crack? I hate it when you beat around the bush. Just come right out and say what you're thinking!!!
May 26th, 2010 2:15 pm
RonKMiller
Re: Windscreen cracked!!

Quote:
Originally Posted by rkimmel2
I have considered everything you have to say and simply do not agree that this is a big issue. Maybe we need to hear from people out there who have had bad experiences with Cee Bailey shields. That could change my mind. In the meantime, there are reasons that people flock to non oem shields when they own BMWs and not all have to do with price. Lack of selection and style along with fogging, scratching and the inability to resurface them have led many to believe that they can do better. I have seen the results of people testing shields with shotgun blasts, but I would find it more convincing if everyday rocks on the road were used in the tests and showed catastrophic damage.
The video I included at the bottom of my post shows a large rock being thrown at both windshields - just about the same size as one that got stuck between the rear tires of my dually a couple of weeks ago. I was lucky it didn't come flying out at speed and nail someone behind me.

It was wedged in so hard I had to jack up the rear, deflate both tires and use a crow bar to pry it out!

I've tried many different windshields on my two LT's in 180K. For me the (polycarbonate) V-stream has been the best, hands down. No fogging like the BMW OEM has been known to do in humid climates and much more scratch resistant. I also have noticed that I'm not constantly fussing with the height adjustment all the time. It seems to have (for me anyway) a sweet spot.
May 26th, 2010 12:49 pm
rkimmel2
Re: Windscreen cracked!!

Quote:
Originally Posted by RonKMiller
The ONLY reason I would prefer acrylic over polycarbonate is that you can polish out fine scratches. If you're careful with polycarbonate you never even have to worry about fine scratches since they usually have a silicon coating that is impregnated into the surface.

As a Commercial Pilot it absolutely drives me nutz that Cee Bailey's uses their "aircraft plastics" logo to sell dangerous products to the average motorcycle consumer. If not downright fraudulent it is certainly "strategic misrepresentation" - a marketing term used by corporate liars and charlatans to justify huge profits.
The only reason they - and others - can get away with selling this garbage is that there are no Federal Motor Safety Vehicle Safety Standards for motorcycle windshields.

Acrylic windshields ARE used on aircraft - where they are designed to be supported and surrounded by a strong metal frame. Almost all of them are a composite layered with - you guessed it - polycarbonate!

BMW has been using polycarbonate since at least 1979 - my R80/7 has one... there must be a good reason they use it when they could use much cheaper acrylic.

Did you ever consider that if your windshield shattered it could cause you to crash?

ZTechnik windshield video

I have considered everything you have to say and simply do not agree that this is a big issue. Maybe we need to hear from people out there who have had bad experiences with Cee Bailey shields. That could change my mind. In the meantime, there are reasons that people flock to non oem shields when they own BMWs and not all have to do with price. Lack of selection and style along with fogging, scratching and the inability to resurface them have led many to believe that they can do better. I have seen the results of people testing shields with shotgun blasts, but I would find it more convincing if everyday rocks on the road were used in the tests and showed catastrophic damage.
May 26th, 2010 12:27 pm
RonKMiller
Re: Windscreen cracked!!

Quote:
Originally Posted by rkimmel2
Most of the aftermarket windshields are acrylic and I for one prefer it to the BMW windshield in every way other than its lack of shatter resistance. I have seen Cee Bailey shields abused sufficiently for me to trust them. If I crash to the extent that my shield shatters, I have bigger problems.
The ONLY reason I would prefer acrylic over polycarbonate is that you can polish out fine scratches. If you're careful with polycarbonate you never even have to worry about fine scratches since they usually have a silicon coating that is impregnated into the surface.

As a Commercial Pilot it absolutely drives me nutz that Cee Bailey's uses their "aircraft plastics" logo to sell dangerous products to the average motorcycle consumer. If not downright fraudulent it is certainly "strategic misrepresentation" - a marketing term used by corporate liars and charlatans to justify huge profits.
The only reason they - and others - can get away with selling this garbage is that there are no Federal Motor Safety Vehicle Safety Standards for motorcycle windshields.

Acrylic windshields ARE used on aircraft - where they are designed to be supported and surrounded by a strong metal frame. Almost all of them are a composite layered with - you guessed it - polycarbonate!

BMW has been using polycarbonate since at least 1979 - my R80/7 has one... there must be a good reason they use it when they could use much cheaper acrylic.

Did you ever consider that if your windshield shattered it could cause you to crash?

ZTechnik windshield video
May 26th, 2010 12:14 pm
LAF
Re: Windscreen cracked!!

Quote:
Originally Posted by rkimmel2
Most of the aftermarket windshields are acrylic and I for one prefer it to the BMW windshield in every way other than its lack of shatter resistance. I have seen Cee Bailey shields abused sufficiently for me to trust them. If I crash to the extent that my shield shatters, I have bigger problems.
After all my searching on what shield to use this was what my final though process was.

I owned a Cee Bailey #2 -6, yes -6, before owning the bike!

Although I would love to have a poly screen I have never heard as many people use or rave about them as they do the Cee Bailey. Seems the shapes are not to a Cee Bailey and people have less satisfaction of them. A Poll would show that in a very quick time I would think.

Someone make me a Cee Bailey in poly and I am down for sure.
May 26th, 2010 11:49 am
rkimmel2
Re: Windscreen cracked!!

Quote:
Originally Posted by RonKMiller
If you are putting on a tinted windshield you are asking for trouble, Only acrylic can be tinted. Very dangerous - send it back.

Acrylic can literally shatter into dagger like shards of plastic...

Most of the aftermarket windshields are acrylic and I for one prefer it to the BMW windshield in every way other than its lack of shatter resistance. I have seen Cee Bailey shields abused sufficiently for me to trust them. If I crash to the extent that my shield shatters, I have bigger problems.
May 26th, 2010 11:33 am
deanwoolsey
Re: Windscreen cracked!!

I believe the damage Loctite causes is from the fumes created as it cures, not the liquid itself. Therefore using it no matter how carefully will weaken the plastic. They do make a stick solid which probably emits much less fumes. Also those holders only call for a few inch-pounds of torque. I only grab the short arm of the allen wrench when I torque mine.
May 26th, 2010 10:19 am
Family_fun
Re: Windscreen cracked!!

I have a BMW low Euro windscreen that came with the bike. I am 6'2" so the origional works fine for me. Euro screen is in very good condition and has no cracks. $125 if interested.
May 26th, 2010 10:12 am
LAF
Re: Windscreen cracked!!

Quote:
Originally Posted by Sit
I do not know when this screen was added to the bike or if it came with the bike when purchased. It is marked BMW and checking the part number, it matches what BMW shows for the Euro screen.

Thanks for the heads up about the rubber washers instead of buying BMW. Was thinking rubber behind and if I can find very thin ones, put some in front also. Not that Im nervous now or anything.

Now the hunt for a new screen. Did find a company, in china I think, Zinged Manufacturing and Exports. They show they have a LT screen, 1/16 acrylic, that if you order now they throw in a tinted low summer screen for free!

May take the screen off tonight after a longer faster test ride to see if it worsens. When I take it off, I will post photos. If it does not worsen, will leave it on until my new Zinged screen arrives.
If you have a glass shop local they have a solvent that works by capillary action and will actually draw into the cracks. You can walk it in and it would take like 5 minuets max. However it was made for acrylic and not sure it will work on poly. The other trick is take the smallest drill bit you have and drill a hole at the end of the crack and it will stop the run. Not sure of the aesthetics or if your silver covers will hide the repair.

I used a dab of silicon caulk into each hole to form the easily lost rubber setup from BMW. Silicon will not stick to any plastic as it does concrete and metal. It will stick but will easily come off or release with a bit of persuasion.

I think your solution is another shield to find perfection, but if you want to run the screen out some of what I offered may help. I buy the metal supports and a set of chrome covers as spares but have never needed them even with a bit of silicone mushed onto them when I remove them. Make sure you use pure silicon caulking not that latex crap, and even RT Gasket maker will work. You don't need a lot. I have had 3 windshields on my LT in 25,000 miles so I have a bit of experience on this.

You don't have to torque the screws through the roof either. Think about it you only want to hold it in place snug, wind pressure does the rest. And always tighten side to side in a cross pattern. Also take into account temperature inversion because all acrylic and poly will expand, With a curved product caution needs to be taken in this regard.

Hope I helped a bit.
May 26th, 2010 9:16 am
Sit
Re: Windscreen cracked!!

I do not know when this screen was added to the bike or if it came with the bike when purchased. It is marked BMW and checking the part number, it matches what BMW shows for the Euro screen.

Thanks for the heads up about the rubber washers instead of buying BMW. Was thinking rubber behind and if I can find very thin ones, put some in front also. Not that Im nervous now or anything.

Now the hunt for a new screen. Did find a company, in china I think, Zinged Manufacturing and Exports. They show they have a LT screen, 1/16 acrylic, that if you order now they throw in a tinted low summer screen for free!

May take the screen off tonight after a longer faster test ride to see if it worsens. When I take it off, I will post photos. If it does not worsen, will leave it on until my new Zinged screeen arrives.
May 26th, 2010 9:08 am
LAF
Re: Windscreen cracked!!

BMW must have changed materials then.

As a 20 year glazier in my former life I know polycarbonate and for a fact it will not run!!!!!!! That is what we call a crack on glass or plastic. Poly will not or can not do this so the material must not be Poly, there is no other choice.

I don't even know anything you can put on it to cause it to brittle. You can stain it or yellow it with wrong cleaners and such but never seen it brittle.

We have fired 12 gauge shotguns at 1/8"-1/4" and I know it's strength.

I am most interested in this as I run acrylic Cee Baileys have since the bike was new, never a problem. I have the high stock that came on the bike and was going to cut it down so I will know as soon as the blade hits it what it is.
May 26th, 2010 4:58 am
saddleman
Re: Windscreen cracked!!

My stock OEM BMW windscreen is cracked at three of the four holes because the rubber washers were missing. The only hole that is not cracked is the one that had the rubber washer.
May 26th, 2010 1:05 am
sheldan2
Re: Windscreen cracked!!

If you pick up some rubber washers, they will work fine in place of your missing doo-dads
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