Site upgrade in progress... Core site functions are working, but some non-critical features/functions will be temporarily unavailable while we work to restore them over the next couple of weeks.

Please post any bugs you encounter, but before you do, check to see if it's already listed.

Thanks for your patience while we work to improve the community.


2003 YZ450-F carb/ idle /fuel.

3 posts in this topic

Hello, I'm new lol . Just picked up a 03 yz450f and I'm experiencing what I believe to be some carburetor issues it takes a bit to start even when warm and when the fuel valve is on it leaks gas out of the bottom of the carburetor and when it's running it doesn't seem to want to idle for more than a few seconds..it just sputters out. I'm am, for the most part new to the dirt bike world and would appreciate any input! Thanks all.[emoji2]

Share this post

Link to post
Share on other sites

Rebuild the carb, adjust the valves, add a remote fuel screw, and learn the process of adjusting it.



Your float needle is stuck or worn out, your fuel screw probably needs a new oring and adjusting, and the valve clearances need to be correct.


Start here



2 people like this

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now