Yamaha 2008 Raptor 250, Service Manual

Page: 31 / 311

SPEC
2-8
Item Standard Limit
Piston rings
Top ring
Type Barrel • • •
Dimensions (B
×
T) 0.90
×
2.75 mm (0.035
×
0.108 in) • • •
End gap (installed) 0.19 ~ 0.31 mm (0.007 ~ 0.012 in) 0.56 mm
(0.022 in)
Side clearance 0.030 ~ 0.065 mm (0.0012 ~ 0.0026 in) 0.115 mm
(0.0045 in)
2nd ring
Type Taper • • •
Dimensions (B
×
T) 0.80
×
2.80 mm (0.031
×
0.110 in) • • •
End gap (installed) 0.30 ~ 0.45 mm (0.012 ~ 0.018 in) 0.80 mm
(0.032 in)
Side clearance 0.020 ~ 0.055 mm (0.0008 ~ 0.0022 in) 0.115 mm
(0.0045 in)
Oil ring
Dimensions (B
×
T) 1.50
×
2.60 mm (0.059
×
0.102 in) • • •
End gap (installed) 0.10 ~ 0.35 mm (0.004 ~ 0.014 in) • • •
Crankshaft
Crank width “A” 69.25 ~ 69.30 mm (2.726 ~ 2.728 in) • • •
Runout limit C1 • • • 0.03 mm
(0.0012 in)
C2 • • • 0.03 mm
(0.0012 in)
Big end side clearance “D” 0.350 ~ 0.650 mm (0.0138 ~ 0.0256 in) 0.50 mm
(0.0197 in)
Big end radial clearance “E” 0.010 ~ 0.025 mm (0.0004 ~ 0.0010 in) • • •
ENGINE SPECIFICATIONS