Piston Pin - Yamaha SZR 660 Service Manual

INSPECTION
AND
REPAIR
®
PISTON
PIN
1.
Check:
Piston pin
Bluecolour/Grooves -> Replace and check
lubrication system.
2.
Measure:
•
External
diameter
(a) of pin
Out
of
specification -> Replace
^
External
diameter
(pin):
21.991
-22.000
mm
3.
Measure:
•
Clearance between
piston
pin
and piston
pin seat
Out
of specification -»
Replace.
• Calculate the piston pin-piston clearance
according
to the following formula:
Clearance between piston
pin
and
piston
=
Diameter on
piston
(b)
-
Diameter
of pin
(a)
Clearance between
piston pin
and
piston:
0.004
-0.024
mm
Maximum
clearance:
0.07
mm
INSPECTION
AND
REPAIR
ENG %m
F
*
Tiff
c^
5
E--
It
J L
A
CRANKSHAFT
1.
Measure:
•
Crank width (A)
Out
of
specification -» Replace crankshaft-
5
Crank
width:
74.95 - 75.00
mm
Runout
(C)
Out of specification -» Replace crankshaft
and/or width bearing.
s
Runout
limit:
0.03
mm
Small end free play (D)
Out of specification
*»
Replace big
end
bearing,
crank
pin
and/or connecting
rod.
Small end free play:
0.8
mm
Big
end
radial clearance (E)
Out
of specification
-» Replace connecting
rod, big
end bearing and/or crank
pin.
^
Big
end
radial clearance:
0.01
- 0.025
mm
Side clearance
(F)
Out
of specification
-* Replace connecting
rod.
Big
end side clearance:
0.35 - 0.65
mm
Crankshaft reassembling point:
The crankshaft
(1)
and
the
crank
pin
(2) oil
passages must be properly interconnected with
a tolerance of less
than
1 .0
mm.
4-41
4-42