Bike isn't that bad, IMO. It has front and rear suspension with real triple clamps holding the fork tubes; front and rear disc brakes that could be upgraded to hydraulic. Worst thing is the 43cc engine. With an engine swap, some paint and polishing, it could be kinda' cool, I think. I usually don't like yellow ( the Milner Coupe and Chipper's Bonanza being rare exceptions ) and that's a lot of yellow! It would look better if the frame were black. Considering the cruiser styling, I'd paint all black, or bright red tank and fenders with black frame. First thing I would do would be to disassemble it and inspect all of the welds; make any needed repairs. Engine swap would be next; I have no idea as to what is available there. Don't be discouraged by negative comments; have fun with your project!