Gotta replace the main bearings in Yamaha KT100 engines waaaaay too often, little suckers are beyond their design parameters... My garage toaster oven is for heating up the cases to about 250-300 degrees or so to take out the main bearings, then drop in new ones fresh from the freezer. My wife doesn't mind me putting bearings in the freezer, but I get yelled at if engine cases end up in her kitchen!
