Naraku QMB139 Adjustable Drive Sheave vl1 Compatibility: Genuine RoughHouse 50 (Standard)

Compatibility: Genuine RoughHouse 50 (Standard) & Black Cat 50

Includes an orange handlebar tether to remind you the lock is engaged before you ride off

Bolt hole diameter: 6mm

TIPS: Lighter roller weights will increase RPM for any given road speed

63"Made of high-strength

Naraku QMB139 Adjustable Drive Sheave vl1 Compatibility: Genuine RoughHouse 50 (Standard)With more linear slots, Naraku's Adjustable Drive Sheave (torque driver, secondary slider) improves acceleration and top speed in bikes with 50cc 139QMB engines. Specifications: Overall Outer Diameter: 118. 7mm Inner Diameter: 33. 5mm Includes rear pulley, bearings, and nut NOTE: If installing on a CSC go, you'll need these clutch slider pins Compatibility: CSC Bella Classic 50 CSC go CSC go MAX CSC Nitro Sport 50 CSC Pug 50 139QMB based 50cc 80cc