We've covered the nuances of the Predator 212 compared to the 212 Ghost engine from Harbor Freight already, but in summary the Ghost is specifically designed for racing and performance applications.

You can actually buy brand new compact engines from Harbor Freight, pre-assembled and ready for action. One good example of this is the 6.5 HP 212cc Predator Engine, which features a simple ball ...

When the 6.5 HP (212 cc) Harbor Freight Predator engine in his kid’s go-kart gave up the ghost after some particularly hard driving, [HowToLou] figured it would be a good time to poke around ...