Need Carb help on 2003 YZ450

1 reply to this topic
  • writebrian

Posted January 01, 2013 - 04:16 PM


The carb on my buddies bike has been acting weird lately. Periodically it just free flows fuel from tank out of hoses to the ground when you turn the fuel on. Is there some way the bowl can get stuck open perhaps? Also doesn't idle well. Will go from high rev to normal idle without any help from rider. Much popping on deceleration (which I believe is a carb issue too).

What should I be looking for? Any links to a removal and 'rebuild' of the carb on this bike? It can't be that hard... right? Any help appreciated.

Edited by writebrian, January 01, 2013 - 04:19 PM.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • grayracer513

Posted January 02, 2013 - 12:40 PM


Sounds like you should look for a bunch of dirt. All it takes is a tiny speck of grit on the float needle to hold it open. Popping and stumbling could be a pilot jet with a varnish deposit. You'll never be able to see that, though, so read this:


Related Content


The "going back to the other darkside" adventure... by Monk

Dirt Bike   Make / Model Specific   KTM   250/350/450/505 SX-F & XC-F (4-Strokes)
  • Hot  113 replies
WR Camshaft Swap Info - last post by jamesm113

WR Camshaft Swap Info

  • 0 replies

Yamaha YZ450F 2017 by Chris.GVS

Yamaha YZ450F 2017
  • * * * * *
  • 1 review
  • Last review by Tommyk_55
  • On January 15, 2017

Chubby dad, looking at bikes , First trip to the orange/black forum ! by Slow_ride

Dirt Bike   Make / Model Specific   KTM   250-530 EXC/MXC/SXC/XC-W/XCR-W (4-Strokes)
  • Hot  28 replies

2016 YZ450 by CaptainKnobby

Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies

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.