Piston rings for twin-cylinder IZH Jupiter motorcycles, 61.75 mm diameter: the factory size for a cylinder that has not been rebored.
- Replace them when compression drops, starting is difficult, or power is lost, and during a piston group repair.
- The Jupiter has two cylinders, so buy rings for both pistons.
- After boring, you need oversize rings.
Before installing them, check the end gap, and line up the ring gaps with the locating pins in the piston grooves.
