The idea of the piston collapsing did cross my mind. Wish I had more areas I could measure on it. It was pretty beat up. I wouldn’t doubt that with as hot as things must have got that it could deform that piston.
As for the F-125, I’m going back and forth if I should continue that rout, or stay simple and go with a KT100 to get my feet wet in the enduro group. Either way, I’ll be racing mostly in Michigan and tracks near by. I think starting next season we’ll have better provisions to be able to travel further for a race, so I’m hoping to hit VIR, Road America, Watkin’s Glen, Daytona, Mid Ohio, and many of the other awesome tracks across this country, probably not all in the same year though.