Universal Parts QMB139 Drive Sheave $13.99 Quantity discounts available QuantityPrice SKU: 151-149 This item is IN STOCKCurrent Stock: 25 Quantity -+ Add to Cart Details Universal Parts Drive Sheave for 50cc 4-stroke QMB139 engines. Specs Inner Diameter: 34mm Overall Outer Diameter: 118mm Supported Models QMB139 50cc/49cc , Various unlisted makes/models DetailsSpecsSupported Models Back Universal Parts Drive Sheave for 50cc 4-stroke QMB139 engines.Please Note: CSC Go scooters will require 3x clutch pins 151-148 to install this drive sheave. (Please see related items.) Back Inner Diameter: 34mmOverall Outer Diameter: 118mm Back QMB139 50cc/49cc , Various unlisted makes/models