Naraku Heavy Duty Crankshaft 16 Tooth | 139QMB Engines Yamaha-Zuma-50 Check diagrams for fitment

Check diagrams for fitment

Stud Spacing: 50mm

Direct replacement for the following 50cc 2-stroke air-cooled and liquid-cooled scooters:

Size: 200mm

Color matched to the Italia edition

Naraku Heavy Duty Crankshaft 16 Tooth | 139QMB Engines Yamaha-Zuma-50 Check diagrams for fitmentThe Naraku Heavy Duty Crankshaft is a premium OEM quality replacement for 50cc 4 stroke QMB139 engines. Built to Japanese and Taiwanese OEM standards, it features heavy duty pre pressed bearings for extended service life and durability a significant step up from low cost Chinese alternatives. Matches the original crank dimensions for a direct drop in fit, and works equally well as a standard replacement or as the foundation for a Big Bore build.