I just got the engine back together with a new cam chain, tensioner, and piston rings. I took the cylinder and piston to the machine shop and had them gauged - perfect - they just deglazed the bore. New gaskets throughout, too. Waiting for new throttle cables from Rocky Mtn. The bike will be up for sale as soon as I'm sure everything is copacetic. The "R" model has the magnificent Keihin fcr 39 square slide pumper carb. Clean Colorado title.