Dr. Pulley Sliders 21x17; Vespa GTS, GTV, GT300

Dr. Pulley sliding roller weights are designed to automatically compensate for wear, enabling them to adjust outward within the movable drive pulley half, thereby facilitating a higher maximum vehicle speed.

Traditionally, CVT gear ratio is altered through the vertical movement of roller weights along the ramp of the moveable drive face in the drive pulley / variator. However, the innovative Dr. Pulley Sliding Roller Weights utilize a sliding motion rather than a rolling one to modify the gear ratio. This distinct sliding action offers significant advantages that enhance CVT performance. With Dr. Pulley, there is no risk of abnormal wear, even under high gear conditions.

Dr. Pulley's U.S. Patent Number 7,276,004, shows how Dr. Pulley roller weights effectively eliminate abnormal wear, prevent deterioration of the reduction gear ratio, extend the transmission's lifespan, and allow for adjustments in both reduction gear ratios and driving performance. 

Model Fitment:

Also fits other makes and models with 21mm x 17mm rollers

Specifications:

• Set of 6
• Diameter 21mm
• Width 17mm

About Dr. Pulley:  Dr. Pulley is recognized as the global leader in aftermarket performance CVT components for a wide range of popular scooter brands, such as Honda, Yamaha, Genuine, Vespa, SYM, Lance, KYMCO, and GY6/QMB powered scooters.  Established in 1987, the company adheres to stringent quality standards and holds ISO 9001 certification. 

Made in Taiwan