I have a predator 224 with a billet rod and flat top piston with a mod 2 cam, ported head, 24mm nibbi slide carb, 22lb springs . Right now if I have the engine disconnected from the drive train system it will hit its max rpm nicely to 7k. With my 30 series torque from Amazon it gets to mabey 5k I believe this is my issue so I have a jurrganuat on the way but I was unsure if my gear ratio could be another issue and currently it's a 10 tooth to a 10 tooth jack shaft to a 60 tooth axel sprocket on 21x8 size tires. New to this hobby and want some information for people with experience.