Scooterworks Exclusive Custom Big Bore Engine Cases for GY6 150 Long Engine. We machine these in matched pairs ourselves! They are bored to fit up to a 63mm Performance Cylinder Kit. Go big.
Cases are matched Right side and Left side, and stamped with a serial number to make sure you have a perfectly matched set.
Check out the following Cylinder Kits that will work with these cases on a GY6 150 Engine:
57.4mm Cast Iron
59mm Cast Iron
61mm Cast Iron
63mm Cast Iron
58.5mm Ceramic
61mm Ceramic
62mm Ceramic
Pick up a new crankcase gasket to go with your new, big bore cases.
Special Bore (Sold in Matched Pair)