Jump to content
Sign in to follow this  

04 RMZ Timing chain skip

Recommended Posts

So I just finished rebuilding my 04 RMZ 250 - new crank, rod, piston, intake valves, etc. but I didn't replace the timing chain because the previous owner told me it was new, and I had only rode the bike 10 times or so. I'm now thinking that wasn't a very intelligent move, as last week I landed off a jump (this is my 4th ride since rebuilding) and she started knocking loudly.:lol:

I tore apart the top end tonight to discover the cam timing was off. The chain must of slipped on the bottom sprocket because the cams themselves seemed to be still aligned to each other.

Can anyone offer any advice as too what I should replace now (aside from the chain)? It was running when I shut it off, should I chance the valves being okay, or? I have heard this is a common problem with these bikes, is there a 'common' fix, or a mod to prevent this from happening again?

Share this post


Link to post
Share on other sites
So I just finished rebuilding my 04 RMZ 250 - new crank, rod, piston, intake valves, etc. but I didn't replace the timing chain because the previous owner told me it was new, and I had only rode the bike 10 times or so. I'm now thinking that wasn't a very intelligent move, as last week I landed off a jump (this is my 4th ride since rebuilding) and she started knocking loudly.:worthy:

I tore apart the top end tonight to discover the cam timing was off. The chain must of slipped on the bottom sprocket because the cams themselves seemed to be still aligned to each other.

Can anyone offer any advice as too what I should replace now (aside from the chain)? It was running when I shut it off, should I chance the valves being okay, or? I have heard this is a common problem with these bikes, is there a 'common' fix, or a mod to prevent this from happening again?

When You change the chain, change also both sliders. Too bad You need to take the head off to change the front one.

luca

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

Reply with:

Sign in to follow this  

×