Rebuilding the fuel petcock

balky1 · January 20, 2020, 01:30:10 PM

http://www.nrp-carbs.co.uk/shop/index.php?route=product/product&product_id=4140

I did have the problem with this kit though. Small plunger O-ring was leaking. The rest of the rubber parts still work fine after 6 or 7 years.

stou · January 20, 2020, 02:09:04 PM

Great, thanks balky1!

stou · January 20, 2020, 02:11:17 PM

Oups... it's out of stock now :-(

I'll write to them to see if they plan to get some more.

T Legg · January 20, 2020, 02:13:25 PM

I spoke with a guy at J&P cycles. He also owns an fj ands has one of their petcock seals sitting on his work bench at home.unfortunately they are too large. It's a good thing the Britt's sell a kit.

balky1 · January 22, 2020, 01:32:29 AM

Quote from: stou on January 20, 2020, 02:11:17 PM
Oups... it's out of stock now :-(

I'll write to them to see if they plan to get some more.

Description says it will be available end of January.

stou · January 23, 2020, 02:58:45 PM

I maybe found a good solution. Only time will tell if it's very good or not. I used TPU and 3D printed a seal. I put some fuel in the valve this morning and still no leak. TPU is a very flexible plastic and it have a very good chemical resistance.

stou · January 23, 2020, 03:02:26 PM

Quote from: balky1 on January 22, 2020, 01:32:29 AM
Description says it will be available end of January.

I didn't noticed that. If my 3D printed not work in long terme test, I'll order one when available. But I'm confident that my printed one will resist to the fuel.

T Legg · August 24, 2020, 09:28:29 PM

Quote from: stou on January 23, 2020, 03:02:26 PM
Quote from: balky1 on January 22, 2020, 01:32:29 AM
Description says it will be available end of January.

I didn't noticed that. If my 3D printed not work in long term test, I'll order one when available. But I'm confident that my printed one will resist to the fuel.

. Stou how is your 3D printed fuel petcock selector gasket holding up ?

T Legg · November 27, 2020, 11:29:57 AM

I've had my rebuilt petcock fail and flow fuel with no vacume present several times now since I've rebuilt it. Twice I took it apart and could find nothing wrong and it would work again for months after I reassembled it. I then replaced the diagram again and then the plunger o-ring and as before it would work fine until it didn't. This time I took it apart and everything looked perfect again so I put two of the springs for the diagram togethor slipped inside each other not end to end . So far so good. No more leaking and it still flows normally with vacume applied.

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Rebuilding the fuel petcock