#35 14T "Magnum" Centrifugal Racing Clutch by Premier Performance
3/4" bore with 3/16" keyway 
The Magnum Clutch is the Beginner's Choice, 4 Cycle Clutch.
A basic guideline is that the Magnum operates best up to 6HP at 6000 RPM.
This 4-cycle clutch design has been developed to provide improved power transmission through a stiffer, more stable drum design.

**There are many variables that play into the performance of a clutch. Tire size, rear sprocket size and rear drive set-up are a few of the main variables that could affect clutch performance. If you are using large tires or a small sprocket, your vehicle may require a belt drive system. Clutch performance is not based soley on the engine size.**