RDLN adjustable sheave rear clutch pulley 1200-1279 angled view showing brushed aluminum sheave body six ramp grooves torque driver collar adapter bushing and hex nut for 139QMB GY6 50cc engines RDLN adjustable sheave rear clutch pulley 1200-1279 angled view showing brushed aluminum sheave body six ramp grooves torque driver collar adapter bushing and hex nut for 139QMB GY6 50cc engines
RDLN adjustable sheave rear clutch pulley 1200-1279 top-down view showing 118mm outer diameter and center red-sealed 6901RS bearing for 139QMB GY6 CVT drivetrain RDLN adjustable sheave rear clutch pulley 1200-1279 top-down view showing 118mm outer diameter and center red-sealed 6901RS bearing for 139QMB GY6 CVT drivetrain
RDLN adjustable sheave rear clutch pulley 1200-1279 angled view showing brushed aluminum sheave body six ramp grooves torque driver collar adapter bushing and hex nut for 139QMB GY6 50cc engines
RDLN adjustable sheave rear clutch pulley 1200-1279 top-down view showing 118mm outer diameter and center red-sealed 6901RS bearing for 139QMB GY6 CVT drivetrain

RDLN

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

SKU 1200-1279
$38.00
Shipping calculated at checkout.
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

Engine Codes
139QMA, 139QMB, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB, BN139QMB, 147QMD, and other QMA/QMB variants

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.
Product Diagrams
Features
  • Adjustable Sheave Design — Six Ramp Grooves: 3 Straight for Quick Takeoff, 3 Curved for Higher Top Speed
  • 118mm Clutch Seat Outer Diameter
  • HK172518RS Needle Bearing and 6901RS Red-Sealed Torque Driver Bearing (12mm ID)
  • Brushed Aluminum Sheave Body with Torque Driver Collar, Adapter Bushing, and Hex Nut Included
  • Off-Road Use Only — Not Legal for Use in California on Pollution-Controlled Vehicles
Specifications

SKU: 1200-1279 | OPS SKU: 151-276 | Brand: RDLN | Clutch OD: 118mm | Needle Bearing: HK172518RS | Torque Driver Bearing: 6901RS (12mm ID) | Ramps: 6 total (3 straight + 3 curved) | Includes: Sheave, torque driver collar, adapter bushing, hex nut | Use: Off-road only
Model Fitments

139QMA | 139QMB | 1P39QMB | 1P39QMA-2 | YN139QMB | JJ1P39QMB | 139FMA-2 | BD1P39QMB | BN139QMB | 147QMD | Other QMA/QMB/FM engine code variants (50-100cc GY6)
  • Same day shipping for orders placed before 2PM (CST) M-F
  • 30-day return period on eligible items
  • Flat-rate shipping for orders shipped to the 48 Contiguous United States.
Since 1989

Supplying parts and accessories for vintage and modern scooters since 1989 – Over Half a Million Served and Counting!

Comprehensive Resource

From wear-and-tear items like tires and oil filters to aftermarket parts from industry-leading brands.

Dealer Focused

With a committed team of dealer-focused sales reps and streamlined pricing and shipping processes, we are dedicated to supporting your business.

Innovative

Our team constantly strives to develop and source the best new products for your scooter.