Piston ring removal and installation

1. 1
   Remove the piston. Refer to “engine bottom side disassembly” .
2. 2
   Carefully spread the ring opening with your thumbs and then push up the opposite side of the 1st ring to remove it.

do not expand the piston ring excessively since it is apt to be broken down.

3. Remove the 2nd ring and oil ring in the same manner.

• when installing the piston ring, be careful not to damage the piston.
• Do not expand the piston ring excessively since it is apt to be broken down.

1. 1
   Install the piston rings in the order of the oil ring, second ring and top ring.
2. 2
   the first member to go into the oil ring groove is the spacer (1).

   After placing the spacer, fit the two side rails (2).

   

when installing the spacer, be careful not to allow its two ends to overlap in the groove.

Incorrect Correct

2. Install the 2nd ring (3) and 1st ring (4) to piston.

Note 1st ring (4) and 2nd ring (3) differ in shape.

Note face the side with the stamped mark upward when assembling.

2. Position the gaps of the three rings and side rails as shown. Before inserting piston into the cylinder, check that the gaps are so located.

1St ring and upper side rail Spacer 2Nd ring and lower side rail In Ex

3. Install each piston and piston pin. Refer to “engine bottom side assembly” .