Removal
Remove the cylinder (see Cylinder Removal).
Place a clean cloth under the pistons and remove the piston pin snap ring [A] from the outside of each piston.
![](https://motoinstruction.ru/img/kawasaki/5/113359.jpg)
Remove the piston pins.
Special Tool - Piston Pin Puller Assembly: 57001-910 [A]
![](https://motoinstruction.ru/img/kawasaki/5/113360.jpg)
Carefully spread the ring opening with your thumbs and then push up on the opposite side of the ring [A] to remove it.
Remove the 3-piece oil ring with your thumbs in the same manner.
![](https://motoinstruction.ru/img/kawasaki/5/113361.jpg)
Installation
Note. If a new piston is used, use new piston ring.
Install the piston with its marking hollow facing forward.
Fit a new piston pin snap ring into the side of the piston so that the ring opening [A] does not coincide with the slit [B] of the piston pin hole.
![](https://motoinstruction.ru/img/kawasaki/5/113362.jpg)
When installing the piston pin snap ring, compress it only enough to install it and no more.
Caution!
- Do not reuse snap rings, as removal weakens and deforms them.
- They could fall out and score the cylinder wall.
Install the oil ring expander [A] in the bottom piston ring groove so the ends [B] butt together.
![](https://motoinstruction.ru/img/kawasaki/5/113363.jpg)
Install the oil ring steel rails, one above the expander and one below it.
Spread the rail with your thumbs, but only enough to fit the rail over the piston.
Release the rail into the bottom piston ring groove.
Note. The oil ring rails have no "top" or "bottom".
Do not mix up the top and second ring.
Install the top ring [A] so that the "R" mark [B] faces up.
Install the second ring [C] so that the "RN" mark [D] faces up.
![](https://motoinstruction.ru/img/kawasaki/5/113364.jpg)