RDLN 107mm Racing Clutch Bell - Performance 139QMB GY6 50

Performance RDLN Racing Clutch Drum Bell (107mm) for 139QMB

Eliminate clutch slippage and maximize your scooter's power delivery with the RDLN Racing Clutch Bell. Designed for high-performance 139QMB / GY6 50cc-100cc engines, this lightweight bell features a vented lattice design to significantly reduce rotational mass for faster acceleration and improved heat dissipation.

The specialized grooved inner drive face provides a superior grippy surface that displaces friction material dust, effectively preventing clutch glazing and ensuring consistent, high-RPM engagement.

Key Performance Benefits:

• Enhanced Engagement: Grooved drive face minimizes slippage and prevents glazing under heavy load.
• Vented Lattice Design: Increases airflow to keep the transmission cooler, extending the life of your clutch pads.
• Lightweight Construction: Reduces rotational inertia for snappier throttle response and higher top-end RPM.
• High-Visibility Red Finish: Adds a custom racing aesthetic to your engine case.

Specific Model Fitment Guide:

• Chicago Scooter Company: go., go. MAX, Bella Classic 50, Nitro Sport 50, Pug 50
• Genuine Scooters: Buddy 50, RoughHouse 50 
• Popular Brands: Fits most TaoTao, Wolf, Lance, BMS, Kymco, and SYM 50cc 4-stroke scooters with a 107mm clutch.
• Engine Compatibility: 139QMA, 139QMB, 1P39QMB, 1P39QMA-2 (50cc to 100cc Big Bore Kits).

Technical Specifications:

• Inner Diameter: 107mm
• Outer Diameter: 117.5mm
• Spline Count: 22 Splines
• Spline Inner Diameter: 11.1mm (Peak-to-Peak)
• Color: RDLN Racing Red 

Note: Professional installation is recommended. Pair with RDLN Performance Clutch Shoes for the ultimate CVT upgrade.

Compatibility: This product is compatible with 50 - 100cc 139QMB engines and those engines with the codes noted below:

139QMB-based 50cc / 80cc engines with the following engine codes:

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.

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.