we're knee deep in fuel man...

3 replies to this topic
  • AussieSin

Posted December 13, 2007 - 01:04 AM



did a recent clean up on a 99 Yz 400 F.

After throwing all the bits back on and getting ready to start the byatch we thru a clean tank of fuel in it, after turning the fuel tap on it started leaking from the fuel tap and also from two of the three clear hoses running from the carb.

as stated we're knee deep in fuel without a freakin clue... or a drop left in the tank...

this is a no smoking zone...

anyone got any ideas? is there a diaphram in the fuel tap that could be brittle and broken?
Why would the carby overflow fuel?


  • 717Dan

Posted December 13, 2007 - 01:27 AM


Sounds like you need a new fuel tap, Try giving the carb a tap with a hammer, it may have a stuck float, not closing off the fuel flow when full, Otherwise strip and clean carb, check float height.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • USED YZ426F

Posted December 13, 2007 - 05:20 AM


My first guess is that the float is not set correctly or is stuck in the carb. That's the first thing that I would check.

  • grayracer513

Posted December 13, 2007 - 06:29 AM


The tap just needs to be replaced. There's kit for them, but the success rate is pretty low.

The carb:
> Float or needle valve stuck or dirty (clean)

> Needle valve dried up/worn out (replace)

Related Content


Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.