Kawasaki H2 Rage 3 VORTEX Primary Clutch

Built specifically for the raw power of the new 4-cylinder Kawasaki H2 platform, the STM Rage 3 VORTEX Primary Clutch is the ultimate driveline upgrade for your high-performance machine. Whether you're dominating the trails, staging for a drag race, or pushing extreme boost, this bolt-on replacement clutch eliminates weak links and ensures every ounce of horsepower makes it to the ground.

By integrating STM’s proven spread-pin cam arm architecture with an oversized bearing, the Rage 3 VORTEX delivers smoother shifting, longer belt life, and unmatched tunability.

Why Upgrade to the Rage 3 VORTEX?

Factory clutches are built for factory specs. When you start modifying your H2, you need a clutch that can handle the extra load. The Rage 3 VORTEX features:

• Massive 2-Way Bearing: An all-new, larger diameter two-way bearing design significantly extends clutch lifespan and creates butter-smooth gear engagement.
• Maximum Tuning Leverage: Utilizes STM's HD-style spread cam arm pin diameter. This improves leverage through the shift curve and allows you to run most standard 5/16" pin-style cam arms.
• Direct Stock Replacement: Fits flawlessly under your factory clutch housing. No custom fab required.
• Belt Compatibility: Designed to grip and perform with stock Kawasaki or stock-replacement aftermarket belts.

Fully Customizable Setup

We know that a one-size-fits-all clutch doesn’t work for custom builds. The Rage 3 VORTEX can be custom-tuned to your specific elevation, tire size, and machine modifications.

• Primary Springs: Compatible with PS-style springs (no spacer) or PATV-style springs using the included spacer. Choose from PATV10 Maroon, PATV22 Bright Yellow, or our aggressive Red/White/Black primary springs to dial in engagement.
• Cam Arm Base Weights: Run exactly what your horsepower demands. Available with 50g to 72g base weights in standard HB series, "AXI" style, or high-engagement notched HBRN series for boosted or drag applications.

Fitment & Installation

• Fits: Kawasaki H2 4-Cylinder Engines
• Secondary Compatibility: Works perfectly with your stock OEM secondary clutch or the upgraded STM Billet Tuner secondary.
• Hardware: Includes a new retaining bolt for installation. (Note: Requires the STM Primary Puller for removal/installation, puller for the Stock Primary is sold separately or added via dropdown).

Stop slipping belts and start putting power to the dirt. Order your custom-tuned Kawasaki H2 Rage 3 VORTEX Primary Clutch today.