Yamaha YFM70RY Service Manual page 34

End gap (installed)
Crankshaft
Width A
Runout limit C
Big end side clearance D
Limit
Big end radial clearance E
Small end free play F
C
Balancer
Balancer drive method
Clutch
Clutch type
Clutch release method
Operation
Clutch lever free play (lever end)
Friction plate 1 thickness
Wear limit
Plate quantity
Friction plate 2 thickness
Wear limit
Plate quantity
Clutch plate thickness
Plate quantity
Warpage limit
Clutch spring free length
Minimum length
Spring quantity
Transmission
Transmission type
Primary reduction system
Primary reduction ratio
Secondary reduction system
Secondary reduction ratio
Operation
Gear ratio
1st
2nd
3rd
F
C
E
D
A
ENGINE SPECIFICATIONS
0.20–0.70 mm (0.01–0.03 in)
74.95–75.00 mm (2.951–2.953 in)
0.030 mm (0.0012 in)
0.350–0.650 mm (0.0138–0.0256 in)
1.00 mm (0.040 in)
0.010–0.025 mm (0.0004–0.0010 in)
0.16–0.40 mm (0.01–0.02 in)
Gear
Wet, multiple-disc
Outer pull, rack and pinion pull
Left hand operation
5.0–10.0 mm (0.20–0.39 in)
2.92–3.08 mm (0.11–0.12 in)
2.82 mm (0.111 in)
7 pcs
2.90–3.10 mm (0.11–0.12 in)
2.8 mm (0.11 in)
1 pc
1.50–1.60 mm (0.059–0.063 in)
7 pcs
0.20 mm (0.0079 in)
50.0 mm (1.97 in)
48.0 mm (1.89 in)
6 pcs
Constant mesh 5-speed forward, 1-speed
reverse
Spur gear
77/34 (2.265)
Chain drive
38/14 (2.714)
Left foot operation
38/13 (2.923)
28/14 (2.000)
25/17 (1.471)
2-7