Checking The Piston - Malaguti Dune X 125 Service Station Manual

Engine

Remove the pin (3).

Remove the piston (4).

Checking the piston


Measure the pin seat diameter on the
piston.

Calculate the pin - piston coupling
clearance.

Measure the piston outside diameter,
perpendicular to the pin axis.

Take the measurement at 6 mm (0.24
in) from the base, at the position shown
in the figure.

Carefully clean the sealing rings hous-
ings.

Measure the sealing rings - grooves
coupling clearance using suitable sen-
sors, as shown in the diagram

If clearances measured exceed the
limits specified in the table, the piston
should be replaced by a new one.
NOTE
MEASURE CLEARANCE BY INSERTING THE BLADE OF
THE FEELER GAUGE FROM THE 2nd SEALING RING
SIDE.
ENG - 164
Dune 125 - Dune X 125 - Euro 4