I have a 1978 Gadabout with a 49cc Minarelli V1 engine. I had an oil leak fixed and the carb cleaned and after getting it back I took it for a long ride and it started having a loud knock (Clunking, Clanking noise). I took it back to my mechanic and at first he thought it was the rod bearing and said he'd pull the top end. He said the cylinder and piston don't "look" bad, so now i'm stuck with a decision. Do i spend the money and replace the cylinder, hoping it fixes the noise? Do i drive it around sounding like shit until it breaks down on me and then figure it out? Any other suggestions what this might be?
Summer is almost over!