Primary shaft – Original version

The primary shaft is the heart of the transmission, transferring engine torque to the clutch and gears. This genuine SHERCO part is manufactured to exact original specifications, ensuring a perfect fit, durable construction and reliable shifting under demanding riding conditions. Replacing with this original part restores factory-level reliability on all listed 125 HRD variants (2023-2024): SM FACTORY RS, BLACK MOON RS and SE FACTORY RS. Benefits include precise tolerances, optimal alignment, reduced wear, and simpler maintenance when paired with the rest of SHERCO’s transmission components. Follow the service intervals and use with the corresponding OEM-grade components for best results.

• Exacting tolerances for smooth operation
• Reliable engagement across gears
• Long-term durability under race and enduro use
• Direct replacement with no modifications needed