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.

Nate_YZ426F

Help :(

5 posts in this topic

i have an 03 yz450, after diving into the cases with the help of a mechanically inclined friend to replace a bad shift fork and slapping the motor back together the bike is locked up. It will roll in neutral (but barely, and it's incredibly stiff) but not in any gear even with the clutch in. When I took off the stator cover off and rotate the flywheel about a half turn the bike will turn over then hit a wall halfway down. My buddy is out of town and I'm kinda lost here, getting really frustrated. What could this be?? A timing issue? Clutch? Tensioner? Helllllpp me

Share this post


Link to post
Share on other sites

Sounds like when you put the cases back together that something in the transmission is in a bind.

1 person likes this

Share this post


Link to post
Share on other sites

Ugh that's exactly what I didn't want to hear lol. This thing is giving me headaches I swear. Is there ANY chance it's not something inside the cases? If it is inside them I'll just be SOL til my buddy gets back in town

Share this post


Link to post
Share on other sites

Update, the bike will move a little better in the upper gears, and will crank over while in higher gears will the clutch in or out, when you get into the lower gears/neutral it locks up about halfway thru the kick

Share this post


Link to post
Share on other sites

Sounds like transmission trouble. Remove the clutch pressure plate, frictions and drives. From there you can run it through the gears on the stand and feel for binding in the shafts. If it seems ok pull the plug and turn the engine over using the flywheel nut. You should be able to at least get some direction by doing some basic investigating.

1 person likes 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