oh yea one other thing. is it possible to over-rev these engines? could that have damaged it? i have the tuned pipe and saturday night we were at a local car cruise at home depot and after the lot had mostly cleared out we decided to do some parking lot racing. mine was really screaming

i think it just sucked a bunch of dirt yesterday. we took them to my friends house where we have a motocross track setup. problem there was we havent had any rain and it was a dust bowl. it probably just pulled some of that dust in and scratched it all up inside. I would like to take it apart and see what the piston and sleeve look like but dont want to if that wont let me exchange it.