HRM Jack Shaft Kit 79-97cc

Complete HRM Jack Shaft Kit for stock 80-97cc engine. This system comes with chain, hardware and directions supplied for a bolt on installation retaining factory clutch safety guard.

Kit includes:

• Jack Shaft Plate Assembled w/ 13-18T Sprockets
• Primary Chain
• Secondary Chain
• Master Links
• Hardware to Mount
• Detailed Instructions

Fits New or Original style DB stock 97cc 2.8hp engine and Motovox MBX10/11/12. NEW!! Monster Moto 80 kits available! NOTE: Original model has metal fenders and straight top frame rails.

Click Here to read our Blog Post about the perks of a HRM Jack Shaft Kit. Questions like, “Why the HRM chain drive Jack Shaft System is a better option than a belt drive Torque Converter” and “Is the 20-30 series TC install worth Installing on your mini bike?” Everything you need to know about Jack Shaft systems VS. Torque Converters.