HEADS UP!!!

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.

Sign in to follow this  
Followers 0
williec

2010 yz450f wont start

3 posts in this topic

I have just completed a rebuild on my 10 yz. Everything went back together as planned but for some reason I can not get it to fire. I set the timing and nothing. It didn't spark every time I kicked it so I 180'd the cans to try it on the other stoke and still nothing. It sparks but not every kick........I am confused and the manual is no help. Not sure if it is getting fuel either......little frustrated because if it was a Carb I could tell. Dang FI has got me stumped.......help thumper buds

Share this post


Link to post
Share on other sites

exactly same problem i have, been at it 2 days trying to get it started but nothing, just put new cosworth piston and cam chain. i might try the old piston back in to see if its thecompression because it seems less with the new piston. let me know if you find the answer

Share this post


Link to post
Share on other sites

Take of all connectors spray WD40 in them read the memory with a Yamahascanner when no faults replace the killswitch and it will run.

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
Sign in to follow this  
Followers 0