Technical data

Check the water jacket for scales and rust. Clean if necessary.
Check the cylinder wall for scratches, damage and
wear. If defective, correct the cylinder by honing or
reboring. Measure the cylinder bore size at three
levels in the directions of A and B.
In case of slight wear of cylinder bore and when only
the piston rings require replacement, check the upper
part of the cylinder for groove wear. If there is
groove wear, remove it by reaming or, when
necessary, by honing.
2. Piston, Pin and Rings
Check the piston for seizure, nicks and wear. Replace
if defective.
Measure the piston O.D. If the piston is excessively
worn, replace. Also check the clearance between the
piston and the cylinder wall. The piston O.D. should
be measured at the lower end of the skirt, across the
thrust faces.
Measure the piston ring side clearance. Replace the
ring if necessary. In the case of a taper ring (No. 1), measure
the side clearance between the lower side of the ring
and the ring groove with the ring outside surface held
flush with the piston outside surface.