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
ANELLI DI TENUTA
Specification Desc./Quantity
Compression ring (top) 0.2 / 0.35 mm (0.0079 / 0.014 in)
Compression ring (middle) 0.2 / 0.35 mm (0.0079 / 0.014 in)
Oil scraper ring 0.2 / 0.7 mm (0.0079 / 0.027 in)
Top ring maximum value 0.45 mm (0.18 in)
Middle ring maximum value 0.45 mm (0.18 in)
Checking the connecting rod small end
•
Measure the inside diameter of the
connecting rod small end using a spe-
cific micrometer.
NOTE
IF THE CONNECTING ROD SMALL END DIAMETER EX-
CEEDS THE MAXIMUM DIAMETER ALLOWED, 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)
RS 125 - Tuono 125 - Euro 4 Engine
ENG - 215
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