NCY Gear Set (16*42); 139QMB, CSC, Wolf, 50cc Picnic Basket Top eye hole ID: 10mm

Top eye hole ID: 10mm

Compatibility & Fitment:

(2006-2009) Vespa GTS/GTV/Super/Sei Giorni/Super Sport 300cc

Whether you are replacing a damaged unit or building a custom disc brake setup

Includes all standard and oil scraper rings

NCY Gear Set (16*42); 139QMB, CSC, Wolf, 50cc Picnic Basket Top eye hole ID: 10mmNCY 139QMB upgear kit for your 50cc 4 strokes is finally here! This kid is made specifically for big bored engines and increases your gear ratio by 24%. This will allow you to maximize your big bore kit by increased top speed and a more usable rev range. You won't see much if any improved performance if you install these on a stock top end.