2017

STM Torsional Spring cover    Fits    All STM Gen 2 snowmobile tuner secondary's that use a torsion spring    All STM Gen 1 ATV Tuner secondary's that use the outer belt deflection adjustment nut...

Replacement movable sheave for the 2001255 Primary  includes bushing & snap ring (Part # 1001004)

Tied clutch brace primary post bearing carrier

Works only with HD style 1st stage cam arms.    Kit includes : 16 - 1 gram washers  3   - 7 gram tungsten washers  6   - M5 x 8mm BHCS 6   - M5 x 10mm BHCS 

ATV Movable Sheave Gen 2. Comes with bushing and bushing retainer installed.

Pneumatic clutch snap ring for bearing.  Sold individually.

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

This is an updated part that replaces part# 1001030 8 Arm ATV screw-on spider comes complete. 

Replacement bolt for 2001297 & 2001251

Four arm screw-on HD spider complete with rollers and buttons.  Works in STM Rage 4 HD primary 8-3/4" diameter or larger. Rebuild kit available: #1001651

Set of 4 rollers.

Supersedes to 2001260 / 2001272       ATV Primary Fixed Sheave comes with fixed sheave part# 2001107 and post part# 2001169 assembled