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steveride

Leaky Carb

11 posts in this topic

Why is gas pissin out the overflow hose on My Float Bowl?? The bike still runs great, But when I stop it pisses out!!

Thanks

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Bad float valve and/or seat. You can try cleaning them, but the frequently need to be replaced when they stop working right.

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Real common problem on the YZFs/WRFs...the o-ring that seals the needle seat to the carb body rots out or compresses, and the float bowl over-fills.

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Thanks BIRDY!! You have 2 Very Cool Bikes!! I want to do the Yellow Hurricne Bike as well, But will Do it when I pick up an older WR250 in the Fall, My 450 is Great the Way it Is!! Oh ya thanks for the Headlite Idea!! Looks & Works Awesome!!

Cheers!!

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The O-ring that you need is Yamaha Part# 8 F2-14147-00.

This is the O-ring that seals the float valve seat into the carb body. It is easy to replace.

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It is easy to replace.

Not on the 03+ carbs. The seat is pressed in (not held in place with the shoulder of a screw) and I've yet to figure out a way to take it apart without damaging the seat. If anyone has successfully done it please share.

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Not on the 03+ carbs. The seat is pressed in (not held in place with the shoulder of a screw) and I've yet to figure out a way to take it apart without damaging the seat. If anyone has successfully done it please share.

I would expect that if it's pressed in, it wouldn't be the source of the leak...

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well i've got a new float valve and gaskets with me, so this weekend i'm going to replace them all and see how I go from there...

hope it fixes the issue!!!! need to ride!

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My 04 started pissing fuel out the over flow and shutting the fuel off didn’t stop it. What happened is the had been stored for a while and rubber in the petcock bonded to the aluminum valve and when I turned on the fuel it tear the rubber and small pieces of rubber went down the fuel line into the carb and got stuck in the float valve.

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