hi there i was wondering if anyone out there has got any wisdom on these champion bikes. I just bought a rd350 86 "model i think". I am new to the road scene as i have had motocross bikes all my life but had the oppatunity to buy this baby so i grabed it.The previous owner spent $2300 rebuilding the motor "have recpites and paper work",but the dopy **** rode it till the tank was dry then just filled her up with unleaded got 500 meters down the road and it seized.Now i have the bike appart and there does not seam to be that much damage in the no2 piston the top ring is seized the bottom not to bad the question is will i be up for a new piston or would a new set of rings and a rebore fix the problem? would appreciate all the feed back as possible as i know very little about these little pocket rockets bye the way im hooked.....