Yamaha TZ250M1, Owner'S Service Manual

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MAINTENANCE SPECIFICATIONS
2-3
EC212000
MAINTENANCE SPECIFICATIONS
EC212111
ENGINE
SPEC
Item Standard Limit
Cylinder head:
Combustion chamber capacity 9.0 cm 3
?
(0.317 lmp oz, 0.304 US oz)
Piston:
Piston clearance 0.090~0.100 mm
?
(0.0035~0.0039 in)
Piston offset 1.0 mm (0.039 in)/EX-side
?
Piston pin:
Piston pin outside diameter 14.995~15.000 mm 14.975 mm
(0.5904~0.5906 in) (0.5896 in)
Piston ring:
Sectional sketch Keystone
?
B=1.0 mm (0.039 in)
?
T=2.2 mm (0.087 in)
?
End gap (installed) 0.22~0.37 mm (0.009~0.015 in) 0.59 mm (0.023 in)
Side clearance (installed) 0.02~0.06 mm (0.0008~0.0024 in) 0.1 mm (0.004 in)
Crankshaft:
Crank width “A” 49.975~50.025 mm (1.968~1.969 in)
?
Runout limit “C” 0.03 mm (0.0012 in) 0.05 mm (0.0020 in)
Connecting rod big end
side clearance “D” 0.45~0.95 mm (0.018~0.037 in)
?
Small end free play “F” 0.8~1.0 mm (0.031~0.039 in) 2.0 mm (0.08 in)
Clutch:
Friction plate thickness 2.9~3.1 mm (0.114~0.122 in) 2.7 mm (0.106 in)
Quantity 6
?
Clutch plate thickness 2.2~2.4 mm (0.087~0.094 in)
?
Quantity 5
?
Warp limit
?
0.1 mm (0.004 in)
Clutch spring free length 30.6 mm (1.205 in) 29.6 mm (1.165 in)
Quantity 6
?
Clutch housing thrust clearance 0.07~0.18 mm (0.003~0.007 in)
?
Clutch housing radial clearance 0.009~0.071 mm(0.0004~0.0028 in)
?
Clutch release method Inner push, cam push
?
Push rod bending limit
?
0.2mm (0.008 in)
Transmission:
Main axle deflection limit
?
0.01 mm (0.0004 in)
Drive axle deflection limit
?
0.01 mm (0.0004 in)
Shifter:
Shifting type Cam drum and guide bar
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Guide bar bending limit
?
0.04 mm (0.0016 in)