Yamaha YXR70FX Service Manual page 44

Item
Oil ring
Dimensions (B × T)
End gap (installed)
Ring side clearance
Crankshaft
Crank width "A"
Maximum runout "C"
Big end side clearance "D"
Big end radial clearance "E"
Small end free play "F"
Balancer
Balancer drive method
Automatic centrifugal clutch
Clutch shoe thickness
Clutch-in revolution
Clutch-stall revolution
V-belt
V-belt width
Transmission
Maximum main axle runout
Maximum drive axle runout
Shifting mechanism
Shift mechanism type
Decompression device
Device type
Air filter oil grade
ENGINE SPECIFICATIONS
B
T
2.50 × 2.80 mm (0.10 × 0.11 in)
0.20 ~ 0.70 mm (0.008 ~ 0.028 in)
0.060 ~ 0.150 mm (0.0024 ~ 0.0059 in)
F
C
C
E
D
A
74.95 ~ 75.00 mm (2.951 ~ 2.953 in)
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0.350 ~ 0.650 mm (0.0138 ~ 0.0256 in)
0.010 ~ 0.025 mm (0.0004 ~ 0.0010 in)
0.16 ~ 0.40 mm (0.0063 ~ 0.0157 in)
Gear
1.5 mm (0.06 in)
1,850 ~ 2,250 r/min
3,500 ~ 4,100 r/min
33.3 mm (1.31 in)
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Shift drum and guide bar
Auto decomp
Foam air filter oil or equivalent oil
2 - 9
SPEC
Standard Limit
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0.030 mm
(0.0012 in)
1.0 mm
(0.04 in)
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1.0 mm
(0.04 in)
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30.0 mm
(1.18 in)
0.06 mm
(0.0024 in)
0.06 mm
(0.0024 in)
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