Dr. Pulley 19x15.5mm sliding roller weights for Vespa, Piaggio, and Aprilia 4-stroke 50cc scooters. The patented sliding shape allows the variator to open wider and close further than standard round rollers � delivering faster acceleration off the line and a higher top-end speed. Available in 5g through 9.5g to match your riding style and modifications. Sold as a set of 6.
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