NCY Gear Set (17*41); 139QMB, CSC, Wolf, 50cc

DESCRIPTION: NCY 139QMB upgear kit for your 50cc 4-strokes is finally here!This kit is made specifically for 88cc big bored engines and increases your gear ratio by 30%.This is the mother of all upgears for the 50cc 139QMB scoots.Only effective if you have a full blown 88cc kit with a big valve head, and stroker crank.
139QMB ENGINES: upgear kit for your 50cc 4-strokes is finally here! This kit is made specifically for 88cc big bored engines and increases your gear ratio by 30%. This is the mother of all upgears for the 50cc 139QMB scoots. Only effective if you have a full blown 88cc kit with a big valve head, and stroker crank.