YX140 Z40 Adjustable Cam Sprocket
 
Also Fits - Zongshen Z140

This Camshaft Sprocket allows you to advance and retard the engine timing to help gain the most power. 
 
MUST BE FITTED VIA A PROFESSIONAL MECHANIC AS DAMAGE MAY OCCUR IF INCORRECTLY USED. FOR BEST RESULTS REQUIRES DYNO SETUP

Item Includes:
•1x Adjustable Cam Sprocket