Description
and more efficiently
Includes wristpin and new wrist pin clips
37 Slightly shorter than stock Balanced upgrade — modest top speed gain with minimal sacrifice in acceleration
2mm / ID: 18mm / W: 20mm
Bolt-on fitment — no case machining required
Gear (4th); Vespa SF centerstand and more efficientlyStandard 2nd gear for vintage Vespa small frame scooters with manual transmission.