Product Description
NCY GY6 50/QMB139 50MM BORE CAST IRON CYLINDER KIT W/O HEAD. THE PERFECT UPGRADE FOR MOST QMB139/GY6 50 SCOOTERS, THIS BOLT-ON 81cc KIT WILL REALLY GIVE YOUR SCOOTER SOME GO. IT IS RECOMMENDED TO GET PART NUMBER 1100-1239, 50mm BIG VALVE HEAD AS WELL, AS MOST STOCK HEADS WILL NOT FIT.
IN ADDITION, WE REALLY RECOMMEND 1100-1250, NCY PERFORMANCE CAMSHAFT AS AN AMAZING COMPLIMENTARY ITEM TO THIS KIT. IT WILL ALLOW THE KIT TO PERFORM TO ITS MAXIMUM POTENTIAL AND GO 50-55 MPH!
HAVE A LOOK AT OUR DECOMPRESSION TUBE ASSEMBLY (1100-1282) WHICH REPLACES YOUR DIPSTICK AND ALLOWS EXCESS CRANKCASE PRESSURE TO BE RELEASED. GOOD IDEA TO INSTALL ONE OF THESE ALONGSIDE ANY CYLINDER KIT UPGRADE.
*ALL THESE ITEMS SUGGESTED CAN BE FOUND IN MY STORE, JUST TYPE THE NUMBER IN THE SEARCH BAR*
*THIS KIT HAS NO CYLINDER HEAD*
THIS IS A DROP IN CYLINDER KIT, NO CRANK CASE MODIFICATIONS REQUIRED! WHEN USED IN CONJUNCTION WITH A STOCK STROKE OF 41.4mm THE TOTAL DISPLACEMENT COMES OUT TO 81cc.
KIT INCLUDES
CYLINDER: 50mm BORE *81cc*
GASKET SET
PISTON WITH PISTON RINGS
WRIST PIN
CIR CLIPS
FITS BRANDS LIKE JONWAY, JMSTAR, ROKETA, SUNL, TANK, PEACE, TAOTAO, GATOR
AND MANY OTHERS
