Polini 1500 RPM Compression Torque Spring | 139QMB Dio et4 150 Polini 16x13 roller weights 3

Polini 16x13 roller weights 3

A collar inside the neck of the pipe must be removed before installation

this simple plug-and-play module is the most effective first step in performance tuning

where a straight valve won't clear the rim halves

Polini 1500 RPM Compression Torque Spring | 139QMB Dio et4 150 Polini 16x13 roller weights 3The Polini Compression Torque Spring (contra spring) at 1500 RPM is a direct fit performance upgrade for Honda Ruckus, Honda Dio, Genuine Buddy Roughhouse, and a wide range of 139QMB based 50cc and 80cc scooters. A stiffer contra spring raises the RPM at which your CVT begins upshifting, keeping the engine in its powerband longer for stronger acceleration and improved top end performance. Made in Italy by Polini to exacting tolerances. Key Features