Leaky Carb


10 replies to this topic
  • steveride

Posted March 22, 2010 - 06:33 PM

#1

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

  • pablo83

Posted March 22, 2010 - 08:17 PM

#2

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

  • Birdy426

Posted March 22, 2010 - 08:44 PM

#3

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.

  • steveride

Posted March 23, 2010 - 06:52 AM

#4

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!!

  • Chas_M

Posted March 23, 2010 - 09:00 AM

#5

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

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  • Harry450

Posted March 23, 2010 - 12:37 PM

#6

birdy, do you mean the o-ring on the accelerator pump or one of the other o-rings?

  • Chas_M

Posted March 23, 2010 - 02:24 PM

#7

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.

  • SXP

Posted March 23, 2010 - 05:53 PM

#8

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.

  • Birdy426

Posted March 24, 2010 - 08:49 PM

#9

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...

  • Harry450

Posted March 25, 2010 - 01:22 AM

#10

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!

  • grizzzly

Posted March 25, 2010 - 07:01 PM

#11

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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