Missed that post. Yes, it will fit as well as any of the horizontal Lifan engines. That's not to say it's an easy change for someone without the proper tools or mechanical aptitude. The engine in the eBay ad has minimal electrical output that will not power lights and charge battery for street use. For use on a street legal bike you will need to install a higher capacity stator and flywheel as well as a rectifier/regulator. Figure an additional $100 - $150.