I agree these engines would not likely survive anything more than bolt on mods and maybe running methanol, but who knows. I just stumbled on a thread here where a member put a turbo on his GY6, and it didn't perform like he thought. Just not enough displacement I think, to really realize any real hp. An engine swap is more likely to get impressive gains over dumping $$ into a cheesy scooter engine, imho. Doing research for the last month on that area, and found a couple good donor bike engines if you don't mind not having reverse for as much as all the bolt on mods and CVT parts, and you almost triple the HP and have actual gears too!! One of these potential candidates is from a Ninja 250, water cooled, ~35 hp/22 ft.lbs. torque, coupled with a 5 speed gearbox. That adds up to a decent off road machine in the long run, and you know the engine was designed to run for 100k miles from the factory, so quality is not pulled into question.
