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ENG
2. Measure:
• piston-to-cylinder clearance
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a. Measure the cylinder bore “C” with a cylin-
der bore gauge.
NOTE:
_
Measure the cylinder bore “C” in parallel to and
at right angles to the crankshaft. Then, find the
average of the measurements.
b. If out of specification, replace the cylinder,
and the piston and piston rings as a set.
c. Measure piston skirt diameter “P” with the
micrometer.
a
10 mm (0.39 in) from the bottom edge of the pis-
ton
d. If out of specification, replace the piston and
piston rings as a set.
e. Calculate the piston-to-cylinder clearance
with the following formula.
Cylinder bore
“C”
102.000 ~ 102.010 mm
(4.0157 ~ 4.0161 in)
Taper limit “T”
0.05 mm (0.002 in)
Out of round
“R”
0.05 mm (0.002 in)
“C” = Maximum D
“T” = (Maximum D
1
or D
2
)
– (Maximum D
5
or D
6
)
“R” = (Maximum D
1
, D
3
or D
5
)
– (Minimum D
2
, D
4
or D
6
)
Piston size “P”
Standard
101.955 ~ 101.970 mm
(4.0140 ~ 4.0146 in)
Piston-to-cylinder clearance =
Cylinder bore “C” –
Piston skirt diameter “P”
Piston-to-cylinder clearance
0.03 ~ 0.055 mm
(0.0012 ~ 0.0022 in)
<Limit>: 0.13 mm (0.051 in)
Summary of Contents for YFM700RV 2009
Page 1: ...YFM700RV SERVICE MANUAL 1S3 28197 E0 ...
Page 34: ...2 11 SPEC ENGINE SPECIFICATIONS Cylinder head tightening sequence 1 3 2 4 5 7 8 6 ...
Page 52: ...2 29 SPEC OIL FLOW DIAGRAMS 1 Oil delivery pipe 2 Oil filter 3 Oil pump 2 3 A A A A 2 1 ...
Page 55: ...2 32 SPEC OIL FLOW DIAGRAMS 1 Balancer 1 2 Crankshaft 2 1 ...
Page 408: ...YAMAHA MOTOR CO LTD 2500 SHINGAI IWATA SHIZUOKA JAPAN ...
