Carb Fuel leak...part number help needed - Triumph Forum: Triumph Rat Motorcycle Forums
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post #1 of 10 (permalink) Old 03-11-2017, 11:55 AM Thread Starter
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Carb Fuel leak...part number help needed

Hello All! I've developed a serious fuel leak by the left carburetor on my 2001 Bonneville. It seems to be coming from the T-fitting/fuel crossover tube (the one that the fuel line attaches to) where it enters the carb. I am assuming that there is an O-ring on the end of the tube (there is a groove on the end of the tube indicating a place for an o-ring) but there is no illustration of it on the Triumph fiche (very frustrating!). I ordered a new replacement T-fitting in hopes that it would come as a complete assembly with new o-rings, as I couldn't come up with any other solution and of course the dealer couldn't help me since it wasn't shown on the fiche. Does anyone in here know what the part number would be for these and/or where I could find replacements? I've Googled every way that I can imagine and have yet to come up with anything. To say that this is annoying and frustrating is an understatement. I really want to get the bike back on the road soon.

Thans in advance!
Scot

"I was born lost and take no pleasure in being found" - John Steinbeck
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post #2 of 10 (permalink) Old 03-11-2017, 12:13 PM
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Hermy's has the cross over pipe with what they call 'U' rings available, part #26. Here's the page:

http://www.triumphestore.com/a/Trium...64731-0-2.html

This is for an '02, but will be the same for an '01.

'02 Bonneville - AI removed, 152MJ's, 42's 1.5 turns out, Air Box Gone/Uni Filters, TPS removed/capped, NH Togas, Nology Coil, Hotwire plug wires, TTP SafeStart, TTP Firestarter, D9 Bracket, Pingel petcock, 19 tooth sprocket, Michelin Pilot Actives.
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post #3 of 10 (permalink) Old 03-14-2017, 06:25 PM Thread Starter
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Thanks for your reply!; However, the diameter of those "U-rings"(those are used on the upper T-fitting which is of a smaller diameter) are different than the ones used on the lower fuel T-fitting.

Thanks again!
Scot

Quote:
Originally Posted by LapinAgile View Post
Hermy's has the cross over pipe with what they call 'U' rings available, part #26. Here's the page:

http://www.triumphestore.com/a/Trium...64731-0-2.html

This is for an '02, but will be the same for an '01.

"I was born lost and take no pleasure in being found" - John Steinbeck
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post #4 of 10 (permalink) Old 03-14-2017, 09:09 PM
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My local NAPA store has o-rings, in both metric and imperial sizes, in boxes of assorted sizes so you can buy onesies/twosies. Take your T fitting and get a couple of different sizes.

Rex
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post #5 of 10 (permalink) Old 06-27-2017, 04:00 PM
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Hi Scot - Any luck with the fuel T-connector? I just sprouted a similar leak on the right carb and am preparing for the carb dismount. Thanks!
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post #6 of 10 (permalink) Old 09-10-2017, 11:20 AM
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I had this issue after cleaning out my carbs. Separated the carbs and found the O-rings were pretty dried out and cracked. Don't know if the carb cleaner damaged them (seems unlikely given the small amount of cleaner) or it cleaned out some gunk that had been holding back the fuel for a while.

Tried some different sizes and went with AS568-010 (OD: 3/8 in.; ID: 1/4; CS: 1/16) on both sides. Working well so far, snug fit, no leaks.

Would love to know the actual spec sizes if anyone has them though.
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post #7 of 10 (permalink) Old 09-12-2017, 12:13 AM
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That was exactly it! Strangely though the side that leaked came off cleanly while the dried crumbled O-ring that I had to scrape off did not leak (yet). I bought replacements from the local dealer, but didn't measure before installing.
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post #8 of 10 (permalink) Old 05-10-2019, 12:53 AM
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Did you need to remove the one of the butterfly valves in order to separate the carbs? I'm looking for the replacement screws.
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post #9 of 10 (permalink) Old 09-11-2019, 06:51 PM
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Did you figure this out? I need to get to the o-rings but not sure how to go about separating the carbs.....
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Originally Posted by KitCloudkicker View Post
Did you need to remove the one of the butterfly valves in order to separate the carbs? I'm looking for the replacement screws.
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post #10 of 10 (permalink) Old 09-12-2019, 01:36 AM
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I did not remove the butterflies. There is a bracket, the enricher slide (choke), and one or two central tubes with bolts, take those off to separate the two carb bodies. The T-connector with the o-rings will require some twisting and pulling to pop apart. It's been a while so I may have forgotten something. Just be careful of the enricher slide, there is a spring and bearing the can shoot out.
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