Scooterworks Exclusive Custom Big Bore Engine Cases for GY6 150 Standard 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)
- Applies to the following models:
- BMS
- Romans 150
- Fly Scooters
- Rio 150
- Jonway
- YY50QT-21A 125
- MotoFino
- 15QT-2 150
- 50QT-2 150
- Peace
- TPGS-804 150
- Roketa
- MC17 Sicily 150
- Schwinn
- Graduate 150
- Hope 150
- TN'G
- Milano 150