Checking The Piston Pin And Piston Pin Bearing - Yamaha CS50 Service Manual

INSPECTION AND REPAIR
EAS00265
CHECKING THE PISTON PIN AND PISTON
PIN BEARING
1. Check:
• piston pin
Blue discoloration/grooves
piston pin and then check the lubrication
system.
2. Measure:
• piston pin outside diameter
Out of specification
pin.
3. Calculate:
• piston-pin-to-piston clearance
Out of specification
pin and piston as a set.
Piston-pin-to-piston clearance=
Piston pin bore diameter
Piston pin outside diameter
4. Inspect:
• bearing (piston pin)
Pitting/Damage
4-15
Replace the piston
Piston pin outside diameter
9.996 ~ 10.000 mm
Replace the piston
Piston-pin-to-piston clearance
0.004 ~ 0.017 mm
<Limit>: 0.07 mm
Change
ENG
Replace the
k
a
k
b -
k
a