Honda WDP30X, Instructions Manual

Page: 12 / 75

Date of Issue: April 2008
2-3
WDP30X
4. MAINTENANCE STANDARDS
PART ITEM STANDARD SERVICE LIMIT
Engine
Maximum governed speed
Idle speed
Cylinder compression
3,000 ~ 3,150 rpm
1,400 +200/-150 rpm
6.0 ~ 8.5 kg/cm
2
(85 ~ 121 psi) at 600 rpm
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Carburetor
Main jet
Float height
Pilot screw opening #60
13.7 mm
(0.54 in)
1-5/8 turns out
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Spark plug Gap 0.7 ~ 0.8 mm (0.028 ~ 0.031 in) -----------------------
Spark plug cap Resistance 7.5 ~ 12.5 k

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Valves
Valve clearance (cold) IN
EX
Stem OD IN
EX
Guide ID IN/EX
Stem clearance IN
EX
Seat width
Spring free length
0.15 ± 0.02 mm
0.20 ± 0.02 mm
5.48 mm
(0.216 in)
5.44 mm (0.214 in)
5.50 mm (0.217 in)
0.02 ~ 0.044 mm (0.0008 ~ 0.0017 in)
0.06 ~ 0.087 mm (0.0024 ~ 0.0034 in)
0.8 mm (0.031 in)
30.5 mm (1.200 in)
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5.318 mm (0.2094 in)
5.275 mm (0.2077 in)
5.572 mm (0.2194 in)
0.10 mm (0.004 in)
0.12 mm (0.005 in)
2.0 mm (0.07 in)
29.0 mm (1.28 in)
Piston
Skirt OD
Piston-to-cylinder clearance
Piston pin bore ID
Pin OD
Piston-to-piston pin bore
clearance 59.985 mm (2.3616 in)
0.015 ~ 0.060 mm (0.0006 ~ 0.0024 in)
13.002 mm
(0.5119 in)
13.000 mm (0.5118 in)
0.002 ~ 0.014 mm (0.0001 ~ 0.0006 in)
59.845 mm (2.3561 in)
0.12 mm
(0.005 in)
13.048 mm (0.5137 in)
12.954 mm (0.5100 in)
0.08 mm (0.003 in)
Piston rings
(GX120K1QX2)
Ring width Top/Second
Oil
Ring side
clearance
Top/Second/Oil
Ring end Top/Second
gap Oil
1.5 mm (0.06 in)
2.5 mm (0.10 in)
0.015 ~ 0.045 mm (0.0006 ~ 0.0018 in)
0.15 ~ 0.35 mm
(0.006 ~ 0.014 in)
0.15 ~ 0.35 mm (0.006 ~ 0.014 in)
1.37 mm (0.054 in)
2.37 mm (0.093 in)
0.15 mm (0.006 in)
1.0 mm (0.039 in)
1.0 mm (0.039 in)
Piston rings
(GX120UT1QX2,
GX120UT2QX2)
Ring width Top
Second
Ring side Top
clearance Second
Ring end Top
gap Second
Oil (side rail)
0.95 ~ 0.97 mm (0.037 ~ 0.038 in)
0.94 ~ 0.96 mm (0.037 ~ 0.038 in)
0.035 ~ 0.070 mm) (0.0014~0.0028 in)
0.045 ~ 0.080 mm (0.0018 ~ 0.0031 in)
0.20 ~ 0.35 mm)
(0.008 ~ 0.014 in)
0.35 ~ 0.50 mm (0.014 ~ 0.020 in)
0.20 ~ 0.70 mm) (0.008 ~ 0.028 in)
0.93 mm (0.037 in)
0.92 mm (0.036 in)
0.150 mm (0.0059 in)
0.150 mm (0.0059 in)
1.0 mm (0.04 in)
1.0 mm (0.04 in)
1.0 mm (0.04 in)
Cylinder Sleeve ID 60.00 mm (2.36 in) 60.165 mm (2.3687 in)
Cylinder head Warpage ----------------------- 0.10 mm (0.004 in)
Connecting rod
Small end ID
Big end ID
Big end oil clearance
Big end axial clearance 13.005 mm (0.5120 in)
26.02 mm (1.0240 in)
0.040 ~ 0.063 mm (0.0016 ~ 0.0025 in)
0.1 ~ 0.4 mm
(0.004 ~ 0.016 in)
13.07 mm (0.515 in)
26.066 mm (1.0262 in)
0.12 mm
(0.005 in)
1.1 mm (0.043 in)
Crankshaft Crankshaft O.D. 25.98 mm (1.023 in) 25.92 mm (1.020 in)
Camshaft
Cam height IN
EX
Camshaft O.D.
27.7 mm (1.090 in)
27.75 mm (1.0925 in)
13.984 mm (0.5506 in)
27.45 mm (1.081 in)
27.50 mm (1.083 in)
13.916 mm (0.5479 in)
Ignition coil
Resistance Primary coil
Secondary coil (cap removed)
Air gap
(at flywheel)
0.8 ~ 1.0

5.9 ~ 7.1 k

0.4 ± 0.2 mm (0.016 ± 0.008 in)
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Revised: April 2012 (PSV61TDP00E2)