alright the people I race with here in minnesota just bought an rm 85. Not even a week later they blew it up took the cylinder and everthing. This bike is completly stock, they get it back together after the first time and ride it for another week and it explodes again. The kid ridding it is not wringing the snot out of it either decent but not one that should toast a a motor every weekend. Hmmm that makes me think these people dont warm their bikes up at all a few blips of the gas and they go tearnin off wot in third gear. Also they mix their gas 40:1 instead of 32:1 which should be done espically in an 85. so what do you guys think. havent had a chance to see the piston yet but they said the ring was cracked in the same two spots each time. Thank you to all you brains out there. Ryan