compression loss

[rob78]

Long story short I was pulling into the pits from racing(low idle) and the bike died. I had 5 races with each one with around 8 mins of run time, motor ran good with no signs of issues, I tried kicking it over but the kick starter moves freely like there's no compression. 06 motor with 08+ output shaft and manual clutch, drained the oil and it was still pretty and clean(changed before race day), checked the valves and they were good, pulled the plug and it looked good.

I was thinking maybe clutch plates were worn??Tthey were replaced alittle over a yr ago but the bike is raced on pavement

Thoughts?

[PlanetMinis.com]

[jdmp]

wierd....I would definately start at the clutch

[Klx110stroker]

Hey man same thing happened to me today. It's the clutch. Pull the clutch lever in fast a bunch. The slave cylinder is sticking inside from lack of pressure build up... So just put it all back together. Untill u start to get compression. Then once u get compression stick it in first gear and do a take off a few times till it gets back to normal. That should help

[rob78]

Another thing to add is that I checked to see if I put it in gear and roll it if it has compression and it does

I was thinking maybe the cultch was sticking but idk now, lol... I will try pumping the clutch when I get home, only thing is its a cable clutch not hydralic

[Smokeum28]

valves maybe to tight! check lash!

[rob78]

valves maybe to tight! check lash!

that was one of the frist things I did

both at .003, .004... same as I always set them at