From our experience in racing, we offer you a straight cut gear primary drive to replace the original chain drive design , featuring a 7075T6 billet aluminum and hard anodized clutch basket.

 Advantages:
- Weight savings

- Improved efficiency (horsepower)

- Improved reliability

- Reduced maintenance cost - stop replacing chains!

- Lighter clutch pull/less fatigue 

- Easy to install

Our design provides a hydraulic-like, minimal clutch lever force to effectively double the force exerted on the clutch plates, which transmits all the power of the motor to the track - where it belongs!

It is manufactured with the highest quality standards available, as proven after a year of competitive tests with excellent results. A 2 hp power increase from 43 to 45 hp was measured above the original chain design as well as improved acceleration throughout its' power curve (as recorded on our dynomometer and on the Blumaq 250cc Bultaco).  All this achieved with zero drive component failures.

In order to see parts and components for repair this assembly, please go to 'Parts and components for AJ5000061' section