Upgrade and convert your Tuner ATV driven into an adjustable torsion spring driven. This has seven adjustable positions on the spring cover and two different spring rates to choose...
STM Torsion spring cover option. Allows the use of a torsion spring with the option of 7 spring load adjustments with one spring.
No drilling or modifications to the STM Secondary is needed.
Does...
Replacement button for the STM Gen 1 ATV tuner secondary and the STM Gen 2 snowmobile tuner secondary. This button replaces the roller.
Sold individually.
