Fuel Leak From Carb Drain Lines?

[CubicH3r0]

I have fuel leaking out rather quickly from the drain lines under my carbs after bike has warmed up. Any ideas? Anything will be greatly appreciated!

[Nessism]

Sounds like the bike is marking it's territory. Make sure the drain likes are routed away from your back tire.

[CubicH3r0]

PS. I forgot to mention it only leaks after it is turned off...

[chuck hahn]

Float heights a bit off allowing them to overfill and go out the overflows???

[OldVet66]

Smack the carb bowls with the plastic end of a screw driver. If they are hanging up this may let them seat. Make sure the petcock is on the run and not the prime position. It's most likely a wake up call that the carbs need rebuilding though, or at least new float needles. my #3 carb rhythmically marks it's territory on rare occasions and a good smack in the bowl straightens it out for the next three or 4 months. Got new needles, too busy riding to change them yet, at least until the first time the screwdriver end fails to work. The only time it happened this year was when the bike sat for three weeks waiting for painted parts.

[sedelen]

Happens to both my bikes if I accidentally leave it in "Prime." Even mentions that in the owners manual that it could do that.

[CubicH3r0]

I know for sure its not the petcock. I also thaught about rebuilding the carbs, but not interested in waiting 2 to 3 weeks for parts and time to rebuild. I guess I will have to carry a rubber mallet with me...lol... at least till summer is over.

[cowboyup3371]

Where are you getting the idea that parts will take 2 to 3 weeks? The orings you would need would take a few days at most from Mr. Barr while the rest you can get locally (Berryman's or equivalent). By the time you have disassembled and dipped each carb body, the orings should be showing up and you can start putting everything together, re-measuring the float heights, bench synching them, and finishing up. Maybe a week to ten days at most.

In my mind, that's a lot better than fighting with it for the next 4 or 5 months.

[Suzuki mad]

Stuck open needle jet that is under the float bowls would do the same thing. So a piece of dirt, rust or even emulsified fuel....

[CubicH3r0]

Thanks everyone. I guess I will have to order my carb rebuild kits and rebuild them. PS Cowboyup3371 I checked the companies you suggested and delivery for the parts will take 3 to 4 weeks...

[Nessism]

Thanks everyone. I guess I will have to order my carb rebuild kits and rebuild them. PS Cowboyup3371 I checked the companies you suggested and delivery for the parts will take 3 to 4 weeks...

cycleoring.com has the rebuild kit. Make sure to get both carb and intake boot O-rings. That is most likely the only parts you will need.

[mike_of_bbg]

HOW do you know this for sure? You said it only does this when the bike is off? If you have an OEM type vacuum petcock and are leave it ON, there shouldn't be any fuel flowing when the bike is off! Even if your needle valves are leaking, when there's no vacuum there shouldn't be any fuel flowing, so your leak should be limited to whatever is in the fuel line. I'd re-evaluate the petcock. Make sure there are no signs of fuel in the petcock vacuum line.

I know for sure its not the petcock. I also thaught about rebuilding the carbs, but not interested in waiting 2 to 3 weeks for parts and time to rebuild. I guess I will have to carry a rubber mallet with me...lol... at least till summer is over.

[cowboyup3371]

That is surprising unless US Mail and Canada Post are fighting with each other again.