All billet construction capable of using compression springs with adjustable spring rate options. Helix angles of 35, 40, 45, 50 degrees available upon request when ordering. We can even provide custom multiple helix angles to your desire for additional fees.

The dual roller option creates a very consistent smooth up shift and backshift. The encapsulated helix design keeps the driven from unloading, opening and going into high gear during downshifting, breaking and jumping. The use of the helix body to support the moveable sheave instead of towers keeps the whole assembly concentric and centered without twisting while under load. This is a tremendous upgrade over the stock driven.

Can be used along with the stock primary but will require the offset spacer, which is available seperatley. Spacer is not required when running the Rage primary clutch.

Please list helix selection in order notes. Select from 35,40,45,50,50/40,55/45,58,48