Hi I'm new to Thumpertalk so I'd like to start off by saying hi. With that being said here goes. I recently bought my son an 05 CRF250 on the very first ride something hit the left side cover draining most of the oil. We all know they don't run well without oil. The motor didn't seize but was on the verge of locking up. The cam,valves and rocker arm looks o.k. but the piston,rings and cylinder were scored. $$$$ and the first payment wasn't made yet. What I would like to know is what the tolerances between the wrist pin and connecting rod should be? Thanks for the help.