All billet design secondary for the new Z10, uses the STM Gen 1 ATV style helixes  

Can be used the the stock primary or the STM billet Rage primary

Uses OEM or OEM replacement belts

Includes retaining washer to be used with OEM bolt

Includes an adjuster nut tool to change the belt and set the belt deflection

Available with a compression spring options.

Choose a helix angle - The most popular helix is the 42/38ºP. It is a good all-around helix. We found that is worked the best for the average to aggressive trail rider.

Choose a spring– The most popular spring is the KSS12 Dark Blue. This spring works well for most average to aggressive trail/dune riders. 

KEEP IN MIND WE CAN ONLY GET YOU CLOSE WITH SET UP. Everyone's riding style is different so it’s up to the customer to do the fine tuning!