I bought out the assets of an old cycle dealer and got a coupla unsold Chinese bikes, including this factory stock doodlebug. I'm trying to think about what I might do with it. It runs fine but is gutless with a full size adult or large kid. I know I can (1) go with an 80 tooth sprocket, cost in parts and machining with be about $70-80, (2) a jack-shaft which goes about $110, or (3) a 212cc predator engine which sell about $110 - 150 depending on where one buys it. Before I spend any money, anyone interested in it. I'd hope to get close to $200 and ill throw in a spare front end taken from a warranty bike. I don't need to sell it and it looks like a fun little project so any thoughts and comments welcome. If I do swap the motor, any interest in the stock running one? I have a dead engine from a warranty repair too, which someone might want. This old shop did some of that before the owner passed. Trying to attach photo.