The Ruima 40mm Cast Iron Cylinder is perfect for those that need a replacement cylinder to rebuild there stock engine. The 40mm bore is the same as the stock for a 50cc displacement. For a fraction of the price you can get great quality and peformance.

The Ruima Cast Cylinder features a 40mm bore with a 10mm wrist pin.

Kit comes with cylinder, piston, rings and gaskets. Cylinder Head sold separately.

This part fits:
Scooters using the Minarelli Horizontal engine with a 10mm wrist pin