Took the top end apart on my 97 Rm250 this afternoon, thought it would be good to order a new Wiseco kit since I just got this bike so I wasn't sure on the history of it.. So far the bike is solid, the guy obviously took care of it.. The top end looked alright, i do have a couple concerns though. Here's some photos of the cylinder, it's hard taking photos of cylinders because of the glare.. it looked pretty good, no bad scoring marks or gouges. Checking the Bore - seems fine to me, within spec The Piston that was in it.. It's an ART piston and you can see marks from where it was slighty rubbing the power valves. If you run your finger over the marks you can't really feel much. This is one of my concerns, can I adjust the powervalve depth in the cylinder on this by turning the 2 dials on the cylinder? Never worked on a RM before.. Here's something else I noticed.. the crank looks like it has a hot spot.. not sure if this is factory from assembly or not.. nothing is bound up, the engine ran good before I took it apart.. There is no play in the connecting rod at all..