Old Geely transplant advice

[douger0500]

I have a geely with a worn to hell and back engine. I have to drive it with one hand on a homemade baffle i made out of radiator hose and duct tape.

I'm not afraid to have to modify the mounts to make another engine work.

I'm not looking to hop anything up I just want a 2 stroke or 4 stroke that can push me up to 45 mph, minus the temper this little bugger gives me...