Never good!

[JakeMansfield]

So yesterday I took my stomp yx 140 pitbike out for a spin, I noticed straight away that there wasn't much power at all, anyway I carried on riding and it wasn't revving high at all and suddenly it popped, lost all power and compression won't run at all. I have a feeling it is the piston rings or the piston as when you kick it off you can hear it moving up and down the barrel (so I think), does anybody else have any idea what's gone wrong? I will be stripping the engine some point this week to try diognose the problem myself but want to know if anybody with more knowledge than me would know anything.
Thanks.

[Brucey]

Hi JakeMansfield and welcome to Pit Bike Club!

[Renaulttom]

What's the compression like if it's still good
1 check the valves
2 check the flywheel maybe the key has broke
Maybe the timing jumped ?

[JakeMansfield]

Originally Posted by Renaulttom

What's the compression like if it's still good
1 check the valves
2 check the flywheel maybe the key has broke
Maybe the timing jumped ?

No there is no compression there were nuts and bolts flying around the head!

[Renaulttom]

That was the nuts for the valve clearance
Take the head of look for any damage
Pistion is probably fine just sort the head out happend to me