Chamfered piston rings, the chamfered part is marked with R on the piston ring and must be directed towards the piston top.
The piston must be oiled during assembly and do not forget to check the needle bearing!
For the longest possible durability and service life, the piston should be "run in" during the first approx. 20 miles.
*Pistons marked with an arrow, the direction of the arrow must be towards the exhaust port.
*Pistons marked with IN, IN must be towards the intake.