Dr. Pulley Sliding Weights (15×12) ;

Dr. Pulley 15×12 Sliding Roller Weights Genuine Buddy 50, Rattler 50, Black Cat 50, RoughHouse 50/50 Sport and other 50cc 139QMB bikes. 

Original Parts For Scooters SKU 169-216-3g

Traditionally, the CVT gear ratio is changed by the up-and-down rolling movement of the roller weights in the ramp of the Moveable Drive Pulley (MDF) or variator.

Now, the innovative Dr. Pulley Sliding Roller Weights slide up and down the ramp to change the gear ratio. This unique sliding movement (not rolling) provides exclusive advantages to increase CVT performance. With Dr. Pulley, no abnormal wear will occur even when running in high gear.

Specifications:

• Size: 15×12
• Set of 6
• Available in 3g-10g weights
• Broadens your range of gear ratios
• Increases acceleration and re-acceleration properties
• Increases top-end speed
• Lasts longer than standard roller weights
• U.S. Patent Number: 7,276,004
• Please Note: Color May Vary

Compatibility:

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 Dr. Pulley: Dr. Pulley is the world’s leading authority for aftermarket performance CVT parts for all popular scooter brands including Honda, Yamaha, Genuine, Vespa, SYM, Lance, KYMCO, and GY6 / QMB powered scooters. Made in Taiwan with strict quality standards since 1987, Dr. Pulley is ISO 9001 certified.