*The store has not been updated recently. You may want to contact the merchant to confirm the availability of the product.
Clutch springs act as an on/off switch allowing you to change at what rpm the clutch will engage depending on the spring rate. The stiffer the spring the longer it takes for the clutch to engage allowing a well tuned engine to reach it's powerband before take off resulting in better acceleration.
We will be in touch after you place your order to confirm your spring choice.