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)
Not legal for use in California on pollution controlled vehicles. Check local laws before installing.
