Replacement Parts

Tuner Belt Spacer Shims Set of 9 (only 6 are shown in image). Used to set the belt deflection on the STM tuner secondaries    

The 24FDU13 bushing is a replacement bushing for some STM tuner secondary movable sheave applications. 

ATV/UTV Movable Sheave

Fits 2011-15 Polaris XP 900 Apex/Z-1 Stm Conversion Tuner Secondary's 2016-20 Polaris XP-1000 Apex/Z-1 STM Conversion Tuner Secondary's  2016-20 Arctic Cat 8000 series STM Snowmobile Gen 2 Tuner Secondary's Qty 1 M10x1.25x75mm HHCS Qty 1 M10...

STM HD compression spring helix cover to be used with the KSS style springs, works with HXATV , HXATVG2 and HXSM2S helix's.  ONLY works on secondary's with a 1.500" diameter post.    Comes complete with  Qty 1 - 2408 Bushing for 1...

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 from. Includes hardware and a spanner tool for ease...

STM Tuner Secondary Gen 2 finned fixed sheave assembly, complete with finned sheave, post, rollers, pins, pin retaining screws.   Fits 2016-2023 Polaris RZR XP 1000 2016-2022 XP 900   Does not fit...

The 24FDU558 bushing is a replacement bushing for some STM tuner secondary Dual Spring Caps sku: 1001676 applications. 

STM secondary retaining bolt M10x1.25x60mm and Belleville spring washer (95221A113).  Used in the STM tuner for the Wildcat XX.

Movable Sheave Bushing Keeper for STM Diamond Drive Sececondary

Works with non-HD style helix cap.