Yamaha 2002 YFM350X, Supplemental Service Manual

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SPEC
MAINTENANCE SPECIFICATIONS
MAINTENANCE SPECIFICATIONS
ENGINE
Model YFM350X(P) 2002
Cylinder:
Bore size 82.97 ~ 83.02 mm (3.267 ~ 3.269 in)
Taper limit <0.05 mm (0.002 in)>
Piston:
Piston size “D” 82.92 ~ 82.97 mm (3.265 ~ 3.267 in)
Measuring point “H” 5.5 mm (0.22 in)
(From bottom line of piston skirts)
Piston clearance 0.040 ~ 0.060 mm
(0.00157 ~ 0.00236 in)
Oversize 2nd 83.5 mm (3.287 in)
4th 84.0 mm (3.307 in)
Piston off-set 0.5 mm (0.02 in)
Piston off-set direction Intake side
Inside diameter (piston pin bore) 19.004 ~ 19.015 mm (0.7481 ~ 0.7486 in)
Outside diameter (piston pin) 18.991 ~ 19.000 mm (0.7477 ~ 0.7480 in)
Piston ring:
Sectional sketch
Top ring: Barrel
B 1.2 mm (0.047 in)
T 3.3 mm (0.130 in)
2nd ring: Tapper
B 1.5 mm (0.059 in)
T 3.4 mm (0.134 in)
Oil ring: B 2.8 mm (0.110 in)
T 2.8 mm (0.110 in)
End gap (installed)
Top ring 0.20 ~ 0.40 mm (0.00787 ~ 0.0157 in)
2nd ring 0.20 ~ 0.40 mm (0.00787 ~ 0.0157 in)
Oil ring 0.30 ~ 0.90 mm (0.012 ~ 0.035 in)
Side clearance Top ring 0.03 ~ 0.09 mm (0.0012 ~ 0.0035 in)
2nd ring 0.03 ~ 0.07 mm (0.0012 ~ 0.0028 in)
Clutch:
Friction plate thickness/quantity 2.74 ~ 2.86 mm (0.107 ~ 0.113 in)/6
Warp limit <2.64 mm (0.104 in)>
Friction plate thickness/quantity 2.94 ~ 3.06 mm (0.116 ~ 0.120 in)/1
Warp limit <2.84 mm (0.112 in)>
Clutch plate thickness/quantity 1.5 ~ 1.7 mm (0.059 ~ 0.066 in)/4
1.9 ~ 2.1 mm (0.0748 ~ 0.0827 in)/2
Max. warpage <0.2 mm (0.00787 in)>
Clutch spring free length/quantity 47.8 mm (1.882 in)/5
Clutch spring minimum free length 46.5 mm (1.831 in)
Clutch release method Outer push (rack and pinon)
H
D
B
T
B
T
B
T