A brand-new design for improved precision and reliability:
• Extended shaft length, ensuring runout less than 0.02mm from factory.
• Significantly improved concentricity of the upper clutch bearing, delivering smoother and more stable transmission.
• Starter coupling no longer sits inside the bearing, reducing the chance of clutch loosening.
• Reduced taper angle on the engine shaft sleeve — reliable engagement without excessive tightening, preventing starter slippage.
• Recommended tightening torque: 18–20 Nm for secure and reliable locking.

👉 Engineered to keep your Nitro system precise and durable at high RPM.