CT110 sat for few days, lost all compression briefly

[RangaBlitzFanga]

Normally there's a decent amount of compression but went to start it again and it felt like a piston was attached and moving, but I could have spun it over with 1 finger. Took a whole bunch of fast kicks to get it started. After it ran for a while compression came back
I did the valves about 100km ago and they're at 0.05mm both.

What the hell? :action-smiley-003:

 

[RangaBlitzFanga]

No one? really? only thing I can think of is the cylinder temp got really high, rings expanded and briefly got stuck against the cylinder wall?

 

[Cordogs]

Has it done it since it started?

 

[rotn50]

May have had a piece carbon deposit stuck between one of the valves, maybe came off the combustion chamber, not sure lad. Is it normal compression now. Have you got a comp gauge?

 

[RangaBlitzFanga]

Don't have a compression guage no, just going by feel of the foot. I know its slightly down on compression normally. When this happened though there was so little compression a guage would be useless, I could have turned it over with my pinky. I havn't ridden the bike for a few days so i'll update if it happens again

 

[zwebx]

May have had a piece carbon deposit stuck between one of the valves, maybe came off the combustion chamber, not sure lad. Is it normal compression now. Have you got a comp gauge?

that was gonna be my guess also

besides somthing funky is goin on are you keen to rip the head off and inspect?
because if its a problem like a valve spring or a nut lost in there it could end pretty bad

 

[RangaBlitzFanga]

that was gonna be my guess also

besides somthing funky is goin on are you keen to rip the head off and inspect?
because if its a problem like a valve spring or a nut lost in there it could end pretty bad

I've never pulled a 4 stroke head off before

 

[zwebx]

I've never pulled a 4 stroke head off before

its pretty easy, if you need help or a tutorial just ask and if your local (just looked im not local) to me bring your bike to me and i can show you how to... if ya need a video tutorial i have a posty laying about that i could dismantle for the fun of it

 

[Hillz]

yer a bit of crap would of been stuck on the valve