Yamaha YFZ450S 2003 Service Manual page 30

Item
Piston rings
Top ring
Type
Dimensions (B × T)
End gap (installed)
Side clearance
2nd ring
Type
Dimensions (B × T)
End gap (installed)
Side clearance
Oil ring
Dimensions (B × T)
End gap (installed)
Crankshaft
Crank width "A"
Runout limit C1
C2
Big end side clearance "D"
Big end radial clearance "E"
ENGINE SPECIFICATIONS
B
T
Barrel
1.2 × 3.5 mm (0.047 × 0.138 in)
0.20 ~ 0.30 mm (0.008 ~ 0.012 in)
0.030 ~ 0.065 mm (0.0012 ~ 0.0026 in)
B
T
Taper
1.00 × 3.35 mm (0.039 × 0.132 in)
0.35 ~ 0.50 mm (0.014 ~ 0.020 in)
0.020 ~ 0.055 mm (0.0008 ~ 0.0022 in)
B
T
2.0 × 2.9 mm (0.079 × 0.114 in)
0.20 ~ 0.50 mm (0.008 ~ 0.020 in)
C1
C2
E
D
A
61.95 ~ 62.00 mm (2.439 ~ 2.441 in)
0.03 mm (0.0012 in)
0.03 mm (0.0012 in)
0.15 ~ 0.45 mm (0.0059 ~ 0.0177 in)
0.010 ~ 0.025 mm (0.0004 ~ 0.0010 in)
Standard
2 - 7
SPEC
Limit
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0.55 mm
(0.022 in)
0.12 mm
(0.0047 in)
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0.85 mm
(0.034 in)
0.12 mm
(0.0047 in)
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0.05 mm
(0.002 in)
0.05 mm
(0.002 in)
0.50 mm
(0.0197 in)
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