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Does Not Fit Stock Airbox
Designed specifically for 52mm big bore cylinder kits on QMB139 4-stroke engines
Fits Vespa
The E-Mission Command is built specifically for the E-bike market and features Vee's new Override technology and boasts 3 times the puncture protection compared to previous models as well as excellent tread life
Naraku QMB139 Adjustable Drive Sheave 52.7mm piston Does Not Fit Stock AirboxWith 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
