This NCY adjustable secondary sliding sheave has two sets of ramp angles, one steeper than the other. These allow you to adjust how quickly the pulley engages. A quicker engagement means more power off the line, and more gradual engagement gives you more power at speed. Fits Honda Dio & Elite as well as SYM DD.
OD 118mm
ID 21mm
Sleeve dia 45mm
Shoulder/race OD 61mm
39mm nut