Product Description
NCY PERFORMANCE GEAR SET (18*46) FOR CHINESE SCOOTERS WITH 50cc qmb139 MOTORS
CHANGE THE GEAR RATIO ON YOU MOTOR FOR MORE PERFORMANCE
NCY QMB139 UPGEAR KIT FOR YOUR 50CC 4-STROKES IS FINALLY HERE! THIS KIT IS MADE SPECIFICALLY FOR LARGER BIG BORED ENGINES AND INCREASES YOUR GEAR RATIO BY 26%. 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. FOR EXPERIENCED TUNERS ONLY.
