RDLN Racing Clutch w/ Adjustable Driven Pulley; 139QMB
RDLN Racing Clutch w/ Adjustable Driven Pulley; 139QMB
$79.33
10 in stock
*Note: Free shipping to U.S. mainland (excludes AK, HI, and territories)
Orders placed by 1pm EST on weekdays ship the same day.
Product Details
Description
RDLN Racing Clutch w/ Adjustable Driven Pulley; 139QMB
Specifications
- Height: 30mm||||Clutch Sheave: 118mm|||||Compatibility: |This product fits 50cc 139QMB engines and those with the following codes.|||139QMB-based 50cc / 80cc engines with the following engine codes:||||||139QMA||139QMB||1P39QMB||1P39QMA-2||||YN139QMB||JJ1P39QMB||139FMA-2||BD1P39QMB||||BN139QMB||147QMD||Other QMA models||Other QMB models|||||Don’t see your engine listed? If the engine code includes “QM” or “FM”, this product is compatible with your vehicle.|||About RDLN:| RDLN is a premier line of aftermarket performance upgrade systems and components for scooters. RDLN products are engineered to significantly improve the function, performance, and reliability of your vehicle with the ultimate goal being an optimal balance of price, power, and performance. RDLN’s extensive field-testing network ensures each product exceeds customer requirements and expectations every time. RDLN delivers full-throttle performance at uncompromised quality.||Made in Taiwan.||This product is intended for off-road use only.||This product is not intended for use on public roads or land.||This product is not legal for use in California on pollution-controlled vehicles. Check local laws before installing.|||*Performance upgrades are considered racing parts and are not covered by warranty.||
Compatibility
Fits many 139QMB-based 50cc / 80cc scooter engines. Confirm measurements, connector style, and engine family before ordering.
Replacement Part Details
Use this part when the original component is worn, damaged, missing, or no longer working correctly. Many scooter parts can look similar but use different sizes, plugs, brackets, thread patterns, or mounting styles, so careful comparison before purchase is recommended.
Compatibility / Fitment
Use the fitment details below to confirm this part matches your scooter before ordering.
- Engine Size: 50cc, 80cc
- Engine Code: 1P39QMA, 1P39QMB, 139QMB, BN139QMB, YN139QMB
- Fits Models / Common Applications: Lance and other compatible models may apply.
- Fitment Notes: Performance
Fitment Guide: This compatibility information is based on manufacturer and supplier data. Listed models are common known applications and may not include every compatible scooter. If your scooter has multiple versions or production changes, confirm the correct match before ordering. Check photos, measurements, original part numbers, engine code, model, and related fitment information whenever possible.
Common Fitment Questions
Q: Will this fit a 1P39QMA engine?
A: This SKU is listed as compatible with 1P39QMA engine-code fitment. Always compare your original part and scooter details before ordering.
Q: Will this fit a Lance?
A: This SKU is listed with Lance model fitment where the scooter also matches the listed engine or fitment notes.
Q: Is this for 50cc scooters?
A: This SKU is listed with 50cc engine-size fitment. Confirm exact model, year, and part style before ordering.
Additional information
| Weight | 4.3 lbs |
|---|---|
| Dimensions | 6 × 6 × 4 in |
| Condition | New |
|---|
Upgrade your entire rear CVT driven assembly with the RDLN Racing Clutch Kit with Adjustable Sheave Pulley for 139QMB and GY6 50cc engines. This complete kit replaces the stock clutch with a performance-engineered unit designed for rapid, reliable engagement and customizable acceleration tuning.
Includes three components: the clutch shoe assembly with red reinforced friction plates and 1500rpm engagement springs; the red anodized vented clutch bell/drum with large tapered vents and splined center bore; and the adjustable six-groove sheave pulley (three straight ramps for quicker off-the-line takeoff, three curved ramps for higher top speed). Cross-drilled holes and tapered vents on the outer drive face enhance heat dissipation under hard use.
- SKU: 1200-1275
- Brand: RDLN
- Clutch Spring Tension: 1500rpm engagement
- Clutch Bell Inner Diameter: 107mm
- Clutch Bell Outer Diameter: 117mm
- Clutch Bell Splines: 22 splines, 11.2mm inner diameter (peak to peak)
- Clutch Shoe Inner Diameter: 24mm (flat to flat) / 28mm (round to round)
- Clutch Shoe Outer Diameter: 105mm
- Clutch Shoe Height: 30mm
- Sheave Outer Diameter: 118mm
- Sheave Ramp Grooves: 6 total — 3 straight (quick takeoff) + 3 curved (top speed)
- Origin: Taiwan
- Includes: Clutch shoe assembly, vented clutch bell/drum, adjustable sheave pulley
| 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 kit.
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. Performance upgrades are considered racing parts and are not covered by warranty.
