RDLN Adjustable Sheave Rear Clutch Pulley – 139QMB GY6 50cc

Description

Upgrade your CVT driven pulley with the RDLN Adjustable Sheave Rear Clutch Pulley for 139QMB and GY6 50–100cc engines. Brushed aluminum sheave body with six adjustable ramp grooves — three straight ramps for quicker off-the-line takeoff and three curved ramps for higher top speed. Includes center red-sealed bearing (6901RS), HK172518RS needle bearing, torque driver collar, adapter bushing, and hex nut. Also listed as OPS SKU 151-276.

Specifications

• SKU: 1200-1279
• Brand: RDLN
• Clutch Seat Outer Diameter: 118mm
• Pulley Needle Bearing: HK172518RS
• Torque Driver Bearing: 6901RS (12mm inner diameter)
• Ramp Grooves: 6 total — 3 straight (quick takeoff) + 3 curved (top speed)
• Includes: Sheave assembly, torque driver collar, adapter bushing, hex nut

Compatibility — 139QMB-Based Engine Codes

If your 50cc-100cc engine code contains “QM” or “FM” it is likely compatible with this pulley.

Off-road use only. Not intended for use on public roads. Not legal for use in California on pollution-controlled vehicles. Check local laws before installing.