Jnewhard92

09 yz450f wont start after rebuild

5 posts in this topic

hey guys i just had my 09 yz450f motor rebuilt. You can kick it for awhile and it wont start and then theres time where it will start. I can pop start it no problem or have my girlfriend pull me with her quad and it will start. Once its started it runs good but will stall out when idling for alittle. wont even start when its warm kicking it. Any ideas?

Share this post


Link to post
Share on other sites

+1 on cam timing and pilot circuit, but be sure on your valve specs too...

Edited by billygildark5007

Share this post


Link to post
Share on other sites

Mine did that right after I rebuilt it. I had the valves a little on the tight side. I reshimed them and it started on the first kick.

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