1. Remove:
- Connecting rod cap "1"
- Connecting rod
- Big end bearings
- Identify the position of each big end bearing so that it can be reinstalled in its original place.
- After removing the connecting rods and connecting rod caps, care should be taken not to damage the mating surfaces of the connecting rods and connecting rod caps.
![](https://motoinstruction.ru/img/yamaha/20/126749.jpg)
2. Remove:
- Piston pin clips "1"
- Piston pin "2"
- Piston "3"
Notice: Do not use a hammer to drive the piston pin out.
- For reference during installation, put identification marks on the piston crown.
- Before removing the piston pin, deburr the piston pin clip groove and the piston pin bore area. If both areas are debarred and the piston pin is still difficult to remove, remove it with the piston pin puller set "4".
Piston pin puller set 90890-01304. Piston pin puller YU-01304.
![](https://motoinstruction.ru/img/yamaha/20/126750.jpg)
3. Remove:
- Topring
- 2nd ring
- Oil ring
When removing a piston ring, open the end gap with your fingers and lift the other side of the ring over the piston crown.
![](https://motoinstruction.ru/img/yamaha/20/126751.jpg)
4. Remove:
- Cylinder
- Cylinder gasket
- Cylinder stud bolts