My mini is a an '07 DB30, it had 8 slots on the engine plate that filled in resorted to center a HF 99cc engine and I mounted a jackshaft for a torque multiplier. I'm tired of cleaned the carb and dealing with 2.5-3.0hp. I have unused GX and a new Predator 212cc too. It was supposed to be for my son to ride but he isn't interested right now so I am going to swap it out. I won't need the jackshaft with either of these engines