Inspecting The Wrist Pin; Inspecting The Piston Rings; Checking The Connecting Rod Small End - Malaguti Dune X 125 Service Station Manual

Engine

Inspecting the wrist pin


Check the pin outside diameter.
Characteristic
Pin
Minimum diameter: 14.995 mm (0.590 in)
Standard diameter: 15.0000 +0/-0.0030 mm
(0.00012 in)

Inspecting the piston rings

Specification
Compression ring (top)
Compression ring (middle)
Oil scraper ring
Top ring maximum value
Middle ring maximum value

Checking the connecting rod small end


Measure the inside diameter of the
connecting rod small end using a spe-
cific micrometer.
NOTE
IF THE DIAMETER OF THE CONNECTING ROD SMALL
END EXCEEDS THE MAXIMUM DIAMETER ADMISSIBLE,
SHOWS SIGNS OF WEAR OR OVERHEATING REPLACE
THE CRANKSHAFT AS DESCRIBED IN THE "CRANKCASE
AND CRANKSHAFT" CHAPTER".
Characteristic
Rod small end
Maximum diameter: 15.023 mm (0.591 in)
Standard diameter: 15.010 - 15.018 mm (0.5910 -
0.5912 in)
ENG - 166
Dune 125 - Dune X 125 - Euro 4
ANELLI DI TENUTA
Desc./Quantity
0.2 / 0.35 mm (0.0079 / 0.014 in)
0.2 / 0.35 mm (0.0079 / 0.014 in)
0.2 / 0.7 mm (0.0079 / 0.027 in)
0.45 mm (0.18 in)
0.45 mm (0.18 in)