2-3
MAINTENANCE SPECIFICATIONS
SPEC
Item
Standard
Limit
Cylinder head:
Combustion chamber capacity
21.5 cm
3
…
(0.757 Imp oz, 0.727 US oz)
Warp limit
…
0.03 mm (0.0012 in)
Cylinder:
Bore size
66.400~66.414 mm
66.5 mm (2.618 in)
(2.6142~2.6147 in)
Taper limit
…
0.05 mm (0.0020 in)
Out of round limit
…
0.01 mm (0.0004 in)
Piston:
Piston size/
66.352~66.367 mm
…
(2.6120~2.6129 in)
Measuring point*
17.5 mm (0.69 in)
…
Piston clearance
0.045~0.050 mm
0.1 mm (0.004 in)
(0.0018~0.0020 in)
Piston offset
1.5 mm (0.059 in)/EX-side
…
Piston pin:
Piston pin outside diameter
17.995~18.000 mm
17.975 mm
(0.7085~0.7087 in)
(0.7077 in)
Piston ring:
Sectional sketch
Plain
…
B=1.0 mm (0.039 in)
…
T=2.55 mm (0.100 in)
…
End gap (installed)
0.40~0.55 mm (0.016~0.022 in)
0.95 mm (0.037 in)
Side clearance (installed)
: 1st
0.030~0.065 mm (0.0012~0.0026 in)
0.1 mm (0.004 in)
: 2nd
0.030~0.065 mm (0.0012~0.0026 in)
0.1 mm (0.004 in)
Crankshaft:
Crank width “A”
59.95~60.00 mm (2.360~2.362 in)
…
Runout limit “C”
0.03 mm (0.0012 in)
0.05 mm (0.0020 in)
Connecting rod big end
side clearance “D”
0.25~0.75 mm (0.010~0.030 in)
…
Small end free play “F”
0.4~1.0 mm (0.016~0.039 in)
2.0 mm (0.08 in)
Clutch:
Friction plate thickness
2.9~3.1 mm (0.114~0.122 in)
2.8 mm (0.110 in)
Quantity
8
…
Clutch plate thickness
1.5~1.7 mm (0.059~0.067 in)
…
Quantity
7
…
Warp limit
…
0.2 mm (0.008 in)
Clutch spring free length
44.0 mm (1.732 in)
42.0 mm (1.654 in)
Quantity
6
…
Clutch housing thrust clearance
0.17~0.23 mm (0.007~0.009 in)
…
Clutch housing radial clearance
0.030~0.055 mm (0.001~0.002 in)
…
Clutch release method
Inner push, cam push
…
EC212000
MAINTENANCE SPECIFICATIONS
EC212100
ENGINE
5MW-9-30-2 7/3/00 2:19 PM Page 4