4. Remove the piston rings (see Piston rings - Removal).
Piston - Wear Check
1. Remove any carbon build-up from the piston crown. Inspect the piston crown for
signs of pitting and check the piston skirt and ring grooves for signs of wear or
scuffing. If any sign of damage is found, renew the piston.
2. Measure the piston outside diameter 9 mm from the bottom of the piston and at 90°
to the direction of the gudgeon pin.
1. Piston outside diameter
2. Measurement point
3. Always refer to the specifications table (see Pistons).
4. Replace the piston and rings if outside the specified limit.
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