camshaft confusion

2 replies to this topic
  • ltdan

Posted May 11, 2006 - 09:21 AM


Hey- my 88 xr600 recently quit running on me. A rattle in the top end (i think) developed and it died, and when i tried starting it agian it would run for a few seconds with the rattle then die again, and now it wont start up. I took the engine out, and took the head cover off and took the camshaft out. The plate (part # 6 on this diagram OEM+%28Stock%29+Parts~dept_type_id~2~model_dept_year~1988~model_dept_mfr~Honda~model_dept_id~375278~model_dept_name~XR600R.asp' class='bbc_url' title='External link' rel='nofollow external'>
between the decompression cam and the first cam moves back and forth very easily. Think mabye this is the source of my rattle and troubles?

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • cleonard

Posted May 11, 2006 - 09:30 AM


I think that's part of the anti-kickback compression release, and mine was rather loose as well. I don't think that is the issue.

If your bike has a lot of hours, I'd be concerned about the health of the valves and the cam chain tensioner. Were all the valve clearances within spec when you took the engine out?

  • davelj

Posted May 13, 2006 - 01:00 AM


My 89 xr600 has some movement in the decompressor cam.

I had a rattle (thought it was the top end) - ended up being worn conrod bearings - piston will rock side to side if one or both are worn.

I would check the valve clearances and cam chain tensioner first (as already suggested) - if the cam chain slips enough, it will never start (happened to me once because of a broken tensioner spring)

all the best


Related Content

Want to add a kickstart to your XR650L?  Here's how - last post by clc3251

Want to add a kickstart to your XR650L? Here's how

  • 1 reply

XR650L super moto wheels by greggkklee

Dirt Bike   Make / Model Specific   Honda   XR600/650
  • Hot  29 replies

93 xr650l Restoration Project by Zigster

Dirt Bike   Make / Model Specific   Honda   XR600/650
  • 17 replies

Wiseco 101MM Spark Knock Low Engine Temps by imandrewparks

Dirt Bike   Make / Model Specific   Honda   XR600/650
  • 9 replies

Fell Off Trailer by usafxr

Dirt Bike   Make / Model Specific   Honda   XR600/650
  • Hot  43 replies

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.