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  Topic Review (Newest First)
Aug 25th, 2016 11:44 pm
Mark65
Re: Life span of plastic quick disconnect

Quote:
Originally Posted by bmwcoolk1200 View Post
To do the full job, you need 4 pieces. 2 male and 2 female. If it already has the QD's on it, some including the dealers, only replace the male end but I think I would just get the boneyard set and replace them all as a metal set. Best practices are to flip them from one line to the other so they can only go together one way. The right way.

New CPC Chrome Plated Brass Fuel Line Quick Disconnect Set - Oilheads & K-Bikes


If you want to spend a few more on better QD's, Voyager and others have used Jiffy-Tite QD's which are more like compressor air hose connects with a sliding collar. No o-rings to mess with.


Jiffy-tite Quick Disconnect Fittings
Yeah, I think for four bucks more I'll go with the Jiffy-Tites. Thanks for the info, Gordon!


Mark
Aug 25th, 2016 11:38 pm
bmwcoolk1200
Re: Life span of plastic quick disconnect

Quote:
Originally Posted by Mark65 View Post
I have not had the tank off my bike (yet), but I want to do this upgrade asap. So, not having actually seen the lines in question, do I need one set or two? Or, two fittings or four?

Thanks in advance!


Mark
To do the full job, you need 4 pieces. 2 male and 2 female. If it already has the QD's on it, some including the dealers, only replace the male end but I think I would just get the boneyard set and replace them all as a metal set. Best practices are to flip them from one line to the other so they can only go together one way. The right way.

New CPC Chrome Plated Brass Fuel Line Quick Disconnect Set - Oilheads & K-Bikes


If you want to spend a few more on better QD's, Voyager and others have used Jiffy-Tite QD's which are more like compressor air hose connects with a sliding collar. No o-rings to mess with.


Jiffy-tite Quick Disconnect Fittings
Aug 25th, 2016 11:28 pm
Mark65
Re: Life span of plastic quick disconnect

I have not had the tank off my bike (yet), but I want to do this upgrade asap. So, not having actually seen the lines in question, do I need one set or two? Or, two fittings or four?

Thanks in advance!


Mark
Aug 2nd, 2016 3:36 pm
JNW003
Re: Life span of plastic quick disconnect

I have no idea why jwacree, having replaced 3 failed plastic QDs over the years, and been a member of this forum since November 2004, is still inquiring about the service life of a plastic fuel line part.

Years ago, I bought a brand new pair of plastic ski boots, stopped skiing for 10 years and left them under the bed. The first time I put them back on at the slopes, I took one step and they cracked off, leaving me wearing a pair of slippers.

Plastic QDs are bound to fail at the most inopportune time. Shortly after joining this forum and reading threads on their propensity to fail, I replaced the stock plastic QDs with Jiffy Tites for peace of mind. Although I understand that BMW now offers one side of the QD in metal, I wouldn't even bother with buying one, as the QD is only as good as it's weakest link...
Aug 2nd, 2016 10:08 am
Voyager
Re: Life span of plastic quick disconnect

Quote:
Originally Posted by jwacree View Post
Follow up reply from CPC

Hi Johnny,



I am sorry if I gave the impression that we do not test our products, we test our standard products and provide our specifications on-line, or with a specific part number we can email a copy. For this particular application we are not in a position to provide maintenance guidelines. BMW specifically chose this part for their application and performed the necessary quality and life-cycle tests for their specific application requirements. When using a CPC component there are many factors that may shorten the life of the coupler, to include the chemical attack of the black o-ring by the additives in the fuel which may causing the leaking you are seeing. When consumers contact CPC directly we typically suggest upgrading the black o-ring to an FKM material to extend the life of the o-ring, however, BMW should be able to provide you with recommendations for their specific application.

So I contacted BMW customer service. I'll let you know what they say.

Again, I'm lookin for the normal service life of these QD fittings.
Somewhere between the showroom floor and the day they fail. I'm lookin for that date.
I don't think it is necessary to change them on a bran new bike. I also don't like changing them after they fail.
You are asking "how high is up"

Your question is not answerable. It depends on way too many factors. And, as I understand it, BMW has already essentially admitted that the male fitting is not up to the job via a service bulletin to dealers to change them to metal. The smart among us change them to all metal of the CPC o-ring style. The brilliant among us change to Jiffy Tites and dispense with the o-rings.


What do you hope to gain by tilting at this windmill? This is by far the highest value change you will make to an LT. $80 to prevent immolation of your bike and possibly yourself. Believe me, the LT has FAR more expensive issues to worry about.
Aug 2nd, 2016 9:04 am
St0rm1
Re: Life span of plastic quick disconnect

Quote:
Originally Posted by jwacree View Post
Follow up reply from CPC

Hi Johnny,



I am sorry if I gave the impression that we do not test our products, we test our standard products and provide our specifications on-line, or with a specific part number we can email a copy. For this particular application we are not in a position to provide maintenance guidelines. BMW specifically chose this part for their application and performed the necessary quality and life-cycle tests for their specific application requirements. When using a CPC component there are many factors that may shorten the life of the coupler, to include the chemical attack of the black o-ring by the additives in the fuel which may causing the leaking you are seeing. When consumers contact CPC directly we typically suggest upgrading the black o-ring to an FKM material to extend the life of the o-ring, however, BMW should be able to provide you with recommendations for their specific application.

So I contacted BMW customer service. I'll let you know what they say.

Again, I'm lookin for the normal service life of these QD fittings.
Somewhere between the showroom floor and the day they fail. I'm lookin for that date.
I don't think it is necessary to change them on a bran new bike. I also don't like changing them after they fail.
To what end? They failed on a 15 year old bike that is no longer made. Even plastic that hasn't been exposed to chemicals will break down in that time and be susceptible to failure. I doubt they have a timeline you're looking for since they consider these parts as a disposable convenience item. Also they won't put a timeframe on a part that is subject to unknown conditions. They don't know if it's been in the freezer, oven, soaked in a bucket of diesel for 10 of those 15 years. Even under normal conditions they don't know how they will all hold up due to manufacturers irregularities. Under lab conditions sure, but in the real world they know they'll last until they don't and then replace them. So I'm confused on why you're treeing this cat. Are you wanting to get them to warranty them?
Aug 2nd, 2016 8:32 am
bmwcoolk1200
Re: Life span of plastic quick disconnect

Quote:
Originally Posted by jwacree View Post
Follow up reply from CPC

Hi Johnny,



I am sorry if I gave the impression that we do not test our products, we test our standard products and provide our specifications on-line, or with a specific part number we can email a copy. For this particular application we are not in a position to provide maintenance guidelines. BMW specifically chose this part for their application and performed the necessary quality and life-cycle tests for their specific application requirements. When using a CPC component there are many factors that may shorten the life of the coupler, to include the chemical attack of the black o-ring by the additives in the fuel which may causing the leaking you are seeing. When consumers contact CPC directly we typically suggest upgrading the black o-ring to an FKM material to extend the life of the o-ring, however, BMW should be able to provide you with recommendations for their specific application.

So I contacted BMW customer service. I'll let you know what they say.

Again, I'm lookin for the normal service life of these QD fittings.
Somewhere between the showroom floor and the day they fail. I'm lookin for that date.
I don't think it is necessary to change them on a bran new bike. I also don't like changing them after they fail.
What you are looking for is a written warranty. Good luck getting that. Just replace them and DON'T use plastic ones as it was a bad choice by BMW in the first place and the fact that there was a recall indicates that strongly. The recall is info probably all you will get.
Aug 2nd, 2016 8:08 am
jwacree
Re: Life span of plastic quick disconnect

Follow up reply from CPC

Hi Johnny,



I am sorry if I gave the impression that we do not test our products, we test our standard products and provide our specifications on-line, or with a specific part number we can email a copy. For this particular application we are not in a position to provide maintenance guidelines. BMW specifically chose this part for their application and performed the necessary quality and life-cycle tests for their specific application requirements. When using a CPC component there are many factors that may shorten the life of the coupler, to include the chemical attack of the black o-ring by the additives in the fuel which may causing the leaking you are seeing. When consumers contact CPC directly we typically suggest upgrading the black o-ring to an FKM material to extend the life of the o-ring, however, BMW should be able to provide you with recommendations for their specific application.

So I contacted BMW customer service. I'll let you know what they say.

Again, I'm lookin for the normal service life of these QD fittings.
Somewhere between the showroom floor and the day they fail. I'm lookin for that date.
I don't think it is necessary to change them on a bran new bike. I also don't like changing them after they fail.
Aug 1st, 2016 9:58 pm
james216
Re: Life span of plastic quick disconnect

Don't even waste your time with the plastic ones. I went with the Jiffy tite Q disconnects Worth the price. And piece of mind.
Aug 1st, 2016 5:23 pm
Voyager
Re: Life span of plastic quick disconnect

Quote:
Originally Posted by jwacree View Post
I contacted CPC, hoping they would have some test data, but no. Here is my question, their reply and my reply to their reply.

and my reply to their reply

So, as the manufacturer of these quick couples, you have not done any testing to determent when they should be replaced. My experience is that these parts don't show any external signs that they are about to fail. I have replaced 3 of them. one was only weeping, one was spraying gas and one broke completely off. all were being ridden at the time they failed. If no testing has been done, we have to rely on the in use failure rate, and hope no one gets burned, literately. I'm going to guess I should contact BMW to see if they have any data on in use failure rate.
Thank you
Johnny


Their reply
The answer to your question really depends on a number of things, climate, storage conditions, maintenance, if you have an older model it probably is time to change them out. We suggest contacting a company called Fast by Ferracci, they are the best source for aftermarket CPC parts for your bike.

My question
Question about the plastic fuel line quick disconnects found on BMW motorcycles.

What is the service life of these fittings.

Does any one here have any data on in use failure rate? I have read every thing from replace at the first service, to,,, well I haven't read any thing about a upper limit. Even CPC used the term " older model" How old is older?

I can say that 15 years is to long, 10 years probably to long. So, is 5 years 15,000 miles about right? Does mileage even come into the mix?

Mechanic improper handling, maybe, you can break almost any thing. My 01 K12LT has had the tank off and on many times, my 05 K12S, as far as I know, only had the tank off once, for the fuel pump recall.
Aug 1st, 2016 2:08 pm
bmwcoolk1200
Re: Life span of plastic quick disconnect

Since they are a known issue and there appears to be no rhyme or reason as to when they WILL break, they should be replaced when they are identified. I believe there was a recall to replace the male plastic end which is what seems to break with metal. For something like that, I would not be worrying so much about lifespan as there are too many variables and simply replace them if you find they are plastic. Check with the dealer to see if there is a recall outstanding for them on your bike.

Personally, I think I will change mine out with the Jiffy-Tite used by Voyager when I replace my external fuel lines this winter. It is simply a better connector for a few dollars more.
Aug 1st, 2016 1:46 pm
jwacree
Re: Life span of plastic quick disconnect

I contacted CPC, hoping they would have some test data, but no. Here is my question, their reply and my reply to their reply.

and my reply to their reply

So, as the manufacturer of these quick couples, you have not done any testing to determent when they should be replaced. My experience is that these parts don't show any external signs that they are about to fail. I have replaced 3 of them. one was only weeping, one was spraying gas and one broke completely off. all were being ridden at the time they failed. If no testing has been done, we have to rely on the in use failure rate, and hope no one gets burned, literately. I'm going to guess I should contact BMW to see if they have any data on in use failure rate.
Thank you
Johnny


Their reply
The answer to your question really depends on a number of things, climate, storage conditions, maintenance, if you have an older model it probably is time to change them out. We suggest contacting a company called Fast by Ferracci, they are the best source for aftermarket CPC parts for your bike.

My question
Question about the plastic fuel line quick disconnects found on BMW motorcycles.

What is the service life of these fittings.

Does any one here have any data on in use failure rate? I have read every thing from replace at the first service, to,,, well I haven't read any thing about a upper limit. Even CPC used the term " older model" How old is older?

I can say that 15 years is to long, 10 years probably to long. So, is 5 years 15,000 miles about right? Does mileage even come into the mix?

Mechanic improper handling, maybe, you can break almost any thing. My 01 K12LT has had the tank off and on many times, my 05 K12S, as far as I know, only had the tank off once, for the fuel pump recall.
Jul 27th, 2016 8:29 pm
jzeiler
Re: Life span of plastic quick disconnect

My cut is assembly technique is what takes them out. The locking groove is very thin and if you are not careful each and every time you connect or disconnect in a straight line you run the risk of a side load that weakens the groove. Given the short hoses that is almost impossible to accomplish. Thus move to the metal male part and you will never have a problem until you nick an o-ring.
Jul 27th, 2016 7:48 pm
Morley
Re: Life span of plastic quick disconnect

Heat is what causes them to fail. How long you ride and in what kind of weather. Mine never failed on my 02 with 40k miles but I replaced them just because. I know a gut that had an 03 and his failed right around 50k
Jul 27th, 2016 2:30 pm
St0rm1
Re: Life span of plastic quick disconnect

Quote:
Originally Posted by jwacree View Post
I just had a QD fail. I made it home with a wet foot. Now I'm wondering, has anyone gathered enough data about these things to say how long they will last? Is it time, or miles, or key cycles, some other factor?
I have had two fail. first was a 2005 K1200S with 15,000 miles. Just after the fuel pump was replaced under the recall. I know, why didn't the shop change the QD while they were there!?
Second one was a 2001 K1200LT, also with 15,000 miles.
Both of them happened this summer!
So, is it 10 years you are due, or is it 15,000 miles?
I'm sure you've also read these two tips as well:

Install the new QD opposite each other on the two lines. In other words, put one male and one female on the fuel pump side that way you never wonder which is the supply side and which is the return.

If you don't want to spend the money on quality QD you can just put a tube in the hose with two clamps. This means any fuel in the tank or system will leak out once the hose is pulled apart but that's not going to be very often.
Jul 27th, 2016 2:21 pm
DanDiver
Re: Life span of plastic quick disconnect

They can fail anytime. Just replace them with metal and be done with it. Not worth the worry. It's an easy replacement. Just like the screws holding on the oil filter cap on the LT. A very weak point that is easy to fix.
Jul 27th, 2016 1:21 pm
K100Dennis
Re: Life span of plastic quick disconnect

Agreed, it would appear to be time related once they are exposed to the fuel. Only other suggestion - have the metal replacements already on hand if you don't want to wait for them to arrive because my experience is the plastic ones will break the first time you attempt to disconnect them.
Jul 27th, 2016 10:06 am
Voyager
Re: Life span of plastic quick disconnect

Quote:
Originally Posted by St0rm1 View Post
I'm no expert but I'd say the answer is "it depends". It depends on what the plastic was made of, how well it was made, what it has been exposed to (ethanol, solvents, sunlight, vibration, shock, etc.), how many times it's been used and so on. There seems to be a history of the stock ones breaking which is why most recommend replacing with an aftermarket set. I personally prefer metal QD so it can withstand most abuse sent it's way. The most I have to worry about is replacing an o-ring which can be found easily.
This is the right answer.

When I bought my 2007 new, my plastic QDs lasted only until:
1. I learned they were plastic and trouble prone thanks to this forum.
2. I could get the Jiffy-Tites from RPW
3. I got the fuel level near empty and made time to remove the fairing panel and replace them.

Plastic parts in a high stress and hazardous application is just dumb.

Replace them soon with metal parts. If you don't mind replacing o-rings periodically, buy the metal version of the stock parts (push tab release like BBY sells). If you want top of line maintenance free parts, spend a couple bucks more and buy the jiffy-tite brand from RPW with the slide collar release like that used on hydraulic lines that carry thousands of psi of pressure.

Just don't keep trying to decide how long plastic parts should last...
And don't do a 50% job and just buy the metal male part as BMW recommends.
Jul 27th, 2016 9:09 am
St0rm1
Re: Life span of plastic quick disconnect

Quote:
Originally Posted by jwacree View Post
I just had a QD fail. I made it home with a wet foot. Now I'm wondering, has anyone gathered enough data about these things to say how long they will last? Is it time, or miles, or key cycles, some other factor?
I have had two fail. first was a 2005 K1200S with 15,000 miles. Just after the fuel pump was replaced under the recall. I know, why didn't the shop change the QD while they were there!?
Second one was a 2001 K1200LT, also with 15,000 miles.
Both of them happened this summer!
So, is it 10 years you are due, or is it 15,000 miles?
I'm no expert but I'd say the answer is "it depends". It depends on what the plastic was made of, how well it was made, what it has been exposed to (ethanol, solvents, sunlight, vibration, shock, etc.), how many times it's been used and so on. There seems to be a history of the stock ones breaking which is why most recommend replacing with an aftermarket set. I personally prefer metal QD so it can withstand most abuse sent it's way. The most I have to worry about is replacing an o-ring which can be found easily.
Jul 27th, 2016 8:19 am
jwacree
Life span of plastic quick disconnect

I just had a QD fail. I made it home with a wet foot. Now I'm wondering, has anyone gathered enough data about these things to say how long they will last? Is it time, or miles, or key cycles, some other factor?
I have had two fail. first was a 2005 K1200S with 15,000 miles. Just after the fuel pump was replaced under the recall. I know, why didn't the shop change the QD while they were there!?
Second one was a 2001 K1200LT, also with 15,000 miles.
Both of them happened this summer!
So, is it 10 years you are due, or is it 15,000 miles?

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