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
mikey454

03 wr450 kick start skipped

5 posts in this topic

Hi i had my bike out on the weekend and it flooded out. While i was kicking the crap out of it the kick starter slipped a couple of times. It only did it though when i dindt roll it over to tdc before kicking it. It has a big bore kit with high compression and when i dont kick it at tdc its like hitting a wall. I stalled it out allot after this happened and it kicked fine and hasnt slipped since. Im just wondering if i should pull the side off and check the ratchet or if i should wait for it to happen again? Also is there anthing i can do to get more decompression when kicking

Share this post


Link to post
Share on other sites

Hopefully it isn't anything too serious. I wonder if there's an easy way to add a manual decompressor...

Share this post


Link to post
Share on other sites

You might want to check the gear around the clutch basket to see if it has any wear, or the kick gear as well.  It's not too terribly hard to pull the cover off that side of the bike an if you lay the bike on it's side you shouldnt even have to drain the oil.

 

Adding a decomp would be pretty difficult, since the decomp on the 03 is simply a menchanical knob on the exhaust cam.  Does it have a YZ exhaust cam?  I know when I dropped in a YZ cam in my bike the decomp sometimes wont engage, which makes the motor feels locked.

Share this post


Link to post
Share on other sites

Thanks. Can i pull the clutch cover off or do i need to pull the whole side of to be able to see the gears? It might have a yz cam in it im not sure i should have checked it when i checked the valves the other day. The decomp was in spec for gap though.it would explain why sometimes it doesnt feel as hard when im rolling it over tdc. Im thinking that i might have bounced the kick a bit and it started to ratchet and disengaged when it hit compression causing it to skip. Or maybe the spring is worn?

Share this post


Link to post
Share on other sites

you will need to pull the whole side off to see the gears.

 

It sounds like you might have a yz cam in there, if it is hard to start sometimes, and easy other times.  You can just roll with it, or mod the cam to work (I think that mod guide is in the TT archives somewhere).

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