valve clearence gone bigger?
Posted May 19, 2011 - 04:16 AM
I checked the valve clearance on my 04 wr450 this morning, I had to re-shim all 5 valves because the gaps were one size too large. The bike has hotcams fitted, was shimmed when I fitted them a while back.
Is this normal? I thought they got tight with wear and use etc?
Posted May 19, 2011 - 05:57 AM
In your case though what you're seeing is the cam lobe surface breaking in. It's hardened but it still initially wears a bit until it gets that pretty polished surface plus the metal compresses a bit under pressure.
I'll bet next time you check it it'll be just fine.
Edited by Sknight, May 19, 2011 - 07:30 AM.