- Install the piston rings in the order of oil ring, 2nd ring and 1st ring.
- The first member to go into the oil ring groove is a spacer 1. After placing the spacer, fit the two side rails 2.
Note: Side designations, top and bottom, are not applied to the spacer and side rails: you can position each either way.
Caution: When installing the spacer, be careful not to allow its two ends to overlap in the groove.
А. Incorrect; В. Correct
- Install the 2nd ring 1 and the 1st ring 2 to the piston.
Note: 1st ring and 2nd ring differ in shape.
- Be sure to bring the concave side of 1st ring to the top when fitting it to the piston.
- 2nd ring has letters "RN" marked on the side. Be sure to bring the marked side to the top when fitting it to the piston.
- Position the gaps of the three ring as shown. Before inserting each piston into the cylinder, check that the gaps are so located.
С. 2nd ring and lower side rail; D. Upper side rail; E. 1st ring and spacer
- Apply a small quantity of MOLYBDENUM OIL SOLUTION onto each piston pins, front and rear.
Molybdenum oil solution
- Assemble the pistons and conrods, front and rear.
Note: When installing the pistons, front and rear, the indents ® on the piston heads must be located to each exhaust side.
- Place a clean rag over the cylinder base so as not to drop the piston pin circlips into the crankcase.
- Install the piston pin circlips, front and rear.
Caution: Use new piston pin circlips to prevent circlip failure which will occur with a bend one.
Note: End gap of the circlip should not be aligned with the cutaway in the piston pin bore.