Windshield fix - BMW Luxury Touring Community
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post #1 of 22 Old Apr 30th, 2018, 11:28 am Thread Starter
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Windshield fix

The windshield on my LT is becoming a mess. Is there a product I can use to restore it or does it just need replacing?
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post #2 of 22 Old Apr 30th, 2018, 12:18 pm
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Re: Windshield fix

I installed a Cee Baileys Sport shield for summer, and have never reinstalled the original. Try Ebay or this forum for a replacement. I think once the plastic becomes trashy, it's best to replace it. Just my .02
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post #3 of 22 Old Apr 30th, 2018, 12:29 pm
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Re: Windshield fix

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Originally Posted by Raver View Post
The windshield on my LT is becoming a mess. Is there a product I can use to restore it or does it just need replacing?
If it is a stock it is a coated poly carbonate and nothing will make it right again. Best to replace.
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post #4 of 22 Old Apr 30th, 2018, 12:46 pm
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Re: Windshield fix

I have one from an 02 you could have for shipping.
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post #5 of 22 Old Apr 30th, 2018, 6:12 pm
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Re: Windshield fix

Quote:
Originally Posted by Raver View Post
The windshield on my LT is becoming a mess. Is there a product I can use to restore it or does it just need replacing?
Polycarbonate doesn't polish well. Replace it. If you want OEM strength, ensure the replacement is polycarbonate. If you don't mind large rocks to the chest and face, then acrylic is fine for blocking wind, bugs and pebbles.
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post #6 of 22 Old May 1st, 2018, 8:20 am
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Re: Windshield fix

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Originally Posted by Voyager View Post
Polycarbonate doesn't polish well. Replace it. If you want OEM strength, ensure the replacement is polycarbonate. If you don't mind large rocks to the chest and face, then acrylic is fine for blocking wind, bugs and pebbles.
My God, are your neighbours angry at you or something. Tell them to stop throwing rocks at you.
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post #7 of 22 Old May 1st, 2018, 12:52 pm
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Re: Windshield fix

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Originally Posted by Wazza View Post
My God, are your neighbours angry at you or something. Tell them to stop throwing rocks at you.
The rationalizations BMW riders make for stepping down from a polycarbonate shield to an acrylic one are almost as good as Harley riders make for buying a Harley.

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post #8 of 22 Old May 1st, 2018, 1:18 pm
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Re: Windshield fix

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Originally Posted by Voyager View Post
The rationalizations BMW riders make for stepping down from a polycarbonate shield to an acrylic one are almost as good as Harley riders make for buying a Harley.
How many options do we now have for a poly windshield besides the stock at the astronomical price per mm.

46 63 2 307 914 WINDSHIELD, HIGH - 620MM 5.72 1 $949.75
46 63 2 347 010 WINDSHIELD - NIEDRIG 440MM 4.61 1 $759.82

Was going to get a CEE Bailey but they are no longer making MC products so I went with a Slipstreamer. I can at least see but they are 177 Aircraft Quality Lucite Acrylic. Not sure how that compares. At least I can see till I get beaned by a boulder.
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post #9 of 22 Old May 1st, 2018, 1:30 pm
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Re: Windshield fix

V-Stream is poly and reasonable. But I love my short stock Euro screen and keep going back to it. Cleaned only with water and soft cloth, it is holding up well after 14 years of use (except for the 2 years I ran a tall with laminar lip, and the V-Stream for 1 year).

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post #10 of 22 Old May 1st, 2018, 1:49 pm
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Re: Windshield fix

Look into a Vstream. My freind has one on his Goldwing and likes it.

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post #11 of 22 Old May 1st, 2018, 2:03 pm
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Re: Windshield fix

Quote:
Originally Posted by bmwcoolk1200 View Post
How many options do we now have for a poly windshield besides the stock at the astronomical price per mm.

46 63 2 307 914 WINDSHIELD, HIGH - 620MM 5.72 1 $949.75
46 63 2 347 010 WINDSHIELD - NIEDRIG 440MM 4.61 1 $759.82

Was going to get a CEE Bailey but they are no longer making MC products so I went with a Slipstreamer. I can at least see but they are 177 Aircraft Quality Lucite Acrylic. Not sure how that compares. At least I can see till I get beaned by a boulder.
Windshield Bible - Why Buy a Motorcycle Windshield

It has been a while since I saw technical data, but the best I've ever seen from acrylic was less than 1/3 the impact resistance of polycarbonate. Many cheap acrylics are less than 1/10 the impact resistance.

The good news is that an acrylic shield will probably protect your windshield arms in a garage tip-over.

I searched and found this which is a pretty thorough comparison. Acrylic is stated as 17 times more impact resistance than glass while polycarbonate is 250 times better than glass or about 15 times better than acrylic. I am sure I have read about some treated acrylics that are only 3 times worse than poly, but their cost is then no longer very advantageous.

https://www.acplasticsinc.com/inform...xan-vs-acrylic

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Last edited by Voyager; May 1st, 2018 at 2:14 pm.
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post #12 of 22 Old May 1st, 2018, 3:06 pm
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Re: Windshield fix

Quote:
Originally Posted by Voyager View Post
Windshield Bible - Why Buy a Motorcycle Windshield

It has been a while since I saw technical data, but the best I've ever seen from acrylic was less than 1/3 the impact resistance of polycarbonate. Many cheap acrylics are less than 1/10 the impact resistance.

The good news is that an acrylic shield will probably protect your windshield arms in a garage tip-over.

I searched and found this which is a pretty thorough comparison. Acrylic is stated as 17 times more impact resistance than glass while polycarbonate is 250 times better than glass or about 15 times better than acrylic. I am sure I have read about some treated acrylics that are only 3 times worse than poly, but their cost is then no longer very advantageous.

https://www.acplasticsinc.com/inform...xan-vs-acrylic
I have read several articles about the benefits of poly so I know I want one in the end. I also got the tall and boy is it tall. I almost can't see over it in the lowest position so that will change also. The slipstream was hopefully a shorter term replacement for the one I couldn't see through especially into the sun. It will do for now as long as I don't drop it in my garage

Gordon
Sugar Hill, GA
2001 K1200LTI – Champagne (current ride) Lazy Susan
1998 R1100RT – Never should have sold it
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post #13 of 22 Old May 1st, 2018, 3:13 pm
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Re: Windshield fix

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I have read several articles about the benefits of poly so I know I want one in the end. I also got the tall and boy is it tall. I almost can't see over it in the lowest position so that will change also. The slipstream was hopefully a shorter term replacement for the one I couldn't see through especially into the sun. It will do for now as long as I don't drop it in my garage
Poly is easy to cut. Cover with painters tape, a couple layers for good measure. Draw the desired contour, I usually use a compass to transfer the stock contour. Cut the shield with a fine tooth bladed jig saw or hand saw if you are patient. Sand a rounded contour with 80 grit, an orbital sander works great. Work down to 400 or even 1000 grit if you want a nearly polished edge. Remove the tape and voila!

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post #14 of 22 Old May 1st, 2018, 3:25 pm
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Re: Windshield fix

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Originally Posted by Voyager View Post
Poly is easy to cut. Cover with painters tape, a couple layers for good measure. Draw the desired contour, I usually use a compass to transfer the stock contour. Cut the shield with a fine tooth bladed jig saw or hand saw if you are patient. Sand a rounded contour with 80 grit, an orbital sander works great. Work down to 400 or even 1000 grit if you want a nearly polished edge. Remove the tape and voila!
That would be great if it was poly.

Gordon
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2001 K1200LTI – Champagne (current ride) Lazy Susan
1998 R1100RT – Never should have sold it
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post #15 of 22 Old May 1st, 2018, 3:53 pm
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Re: Windshield fix

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That would be great if it was poly.
Acrylic cuts nearly as easy. Just use a really fine blade as acrylic is harder and can crack if a blade takes too big a bite. I cut my Kawasaki Voyager shield down and I'm quite sure it was acrylic. I think BMW is about the only manufacturer smart enough to use poly. Even light aircraft makers use acrylic which is why bird strikes are so dangerous. Even at 100 mph, a small bird will punch right through acrylic. I am still surprised that the FAA certifies aircraft with windshields that can't stop a pigeon.

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post #16 of 22 Old May 1st, 2018, 4:36 pm
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Re: Windshield fix

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Originally Posted by Voyager View Post
Acrylic cuts nearly as easy. Just use a really fine blade as acrylic is harder and can crack if a blade takes too big a bite. I cut my Kawasaki Voyager shield down and I'm quite sure it was acrylic. I think BMW is about the only manufacturer smart enough to use poly. Even light aircraft makers use acrylic which is why bird strikes are so dangerous. Even at 100 mph, a small bird will punch right through acrylic. I am still surprised that the FAA certifies aircraft with windshields that can't stop a pigeon.
Not going to try and cut it now as I will be at IronHorse tomorrow. It may be useful full length to someone else if I get a different one or I may hang onto it if I like it on the road. I haven't really ridden with it yet except a few miles where I realized how tall it was.

Gordon
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post #17 of 22 Old May 1st, 2018, 4:58 pm
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Re: Windshield fix

Before spending big money, try rubbing te screen with 90% alcohol (or more). You can buy it at the local pharmacy. Works great for my screen. The white glance disappears.
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post #18 of 22 Old May 1st, 2018, 6:32 pm
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Re: Windshield fix

I have a screen made by Eagle Screens here in Australia. Mine is tall and I was thinking about getting a shorter one. I looked up their website and the prices are pretty good.
It ranges from $180 Aud for the shortest one up to $310 Aud for the tallest screen.
Replacement Motorcycle Screens | Eagle Screens Australia
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post #19 of 22 Old May 3rd, 2018, 10:12 am
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Re: Windshield fix

I think the debate between polycarbonate or acrylic on the LT is specious.
An object with enough mass and energy to breach an acrylic screen would likely break the arms holding a polycarbonate screen too.

I tried a Euro cut screen and it was a bit too short for my liking. It could not provide any deflection of light rain in the fully up position. Fully down, it was about like a sportbike screen; barely there. I bought an inexpensive (i.e. ratty) full size OEM screen to experiment and cut about 2in off the top. The intermediate height works for me. I will either leave it all alone or go back and cut down the original screen since it is in better condition.

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post #20 of 22 Old May 3rd, 2018, 4:17 pm
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Re: Windshield fix

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I think the debate between polycarbonate or acrylic on the LT is specious.
An object with enough mass and energy to breach an acrylic screen would likely break the arms holding a polycarbonate screen too.
I have more confidence in BMW engineering than you do. I suspect they designed the arms to withstand most of what a poly windshield can take. And poly can take a lot more than acrylic. This doesn't matter to everyone, so acrylic is a fine solution for such folks. As an engineer myself, I see no reason to settle for less than what BMW designed into the windshield system.

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post #21 of 22 Old May 4th, 2018, 7:49 am
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Re: Windshield fix

Hi Raver,
I live in Brazil, and do not even think about buying a new one, only in the last case. I took it to a professional who does polishing and automotive painting. I just asked to polish it, and they did it. Amazing, it looked new, I really surprised myself with the service. So try to find some reliable polisher close to you, and after this tell me what happens.
Regards,
Lincoln
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post #22 of 22 Old May 4th, 2018, 9:08 am
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Re: Windshield fix

My LT has 182,000 miles. Last year, I replaced the original screen which had finally faded enough that I needed another one. I found a 'take off' that someone had in his garage since his 2008 bike was delivered. I think it was $200, and it was new. I've found that the original screen is the right height and protection for me. There is a screen on Ebay this morning for $68, with free shipping. It says 'normal' wear. For that price, I'd take a look at it even as a spare.

My two cents....

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