Thunder Shift/Heavy Hitter Accessories
Part No.	Description

76-HSY100	Yamaha Drive Spring (155/300)
76-HSA100	Arctic Cat Drive Spring (165/310)
76-HSP100	Polaris Drive Spring (165/310)
76-HSA200*	Arctic Cat Driven Spring (similar to AC red)
76-HSP200*	Polaris Driven Spring (similar to Polaris silver/blue)
76-TSK500	Tungsten Washer (3.4g each)
76-TSK501	Tungsten Washer (5.3g each)
76-TSK570	Weight Bushing for pivot hole
76-TSK571	Yamaha Weight Bushing
76-TSK575	Ski-Doo Roller Bushing
76-TSK576	Ski-Doo Pivot Bushing (each)
76-TSK580	Rebushing Tool
76-Clutch Tool	Clutch C Clamp

* Secondary (Driven) Springs have 25% more compression rate than standard OEM springs. The increased compression rate in the secondary or driven springs produces more belt side pressure and less slippage. Back shifting is also improved. The standard torsional rate of the OEM spring that the TPI Spring replaces is shown in parenthesis.