Honda WB20XT2, Руководство пользователя

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WB20XT2•WB30XT2 SERVICE INFORMATION
WB30XT2
Unit: mm (in)
Part Item Standard Service limit
Engine Maximum speed (at no load)
3,900 ± 100 min -1 (rpm)
–
Idle speed
1,400
+ 200
min -1 (rpm)
–
– 150
Cylinder compression
0.49 – 0.69 MPa (5.0 – 7.0 kgf/cm 2 , 71 –
100 psi)/600 min -1 (rpm)
–
Cylinder head Warpage – 0.10 (0.004)
Cylinder Sleeve I.D. 68.000 – 68.015 (2.6772 – 2.6778) 68.165 (2.6837)
Piston Skirt O.D. 67.985 – 67.995 (2.6766 – 2.6770) 67.845 (2.6711)
Piston-to-cylinder clearance 0.005 – 0.030 (0.0002 – 0.0012) 0.12 (0.005)
Piston pin bore I.D. 18.002 – 18.008 (0.7087 – 0.7090) 18.048 (0.7105)
Piston pin Pin O.D. 17.994 – 18.000 (0.7084 – 0.7087) 17.954 (0.7068)
Piston pin-to-piston pin bore
clearance
0.002 – 0.014 (0.0001 – 0.0006) 0.08 (0.003)
Piston rings Ring side clearance Top 0.060 – 0.095 (0.0024 – 0.0037) 0.15 (0.006)
Second 0.045 – 0.080 (0.0018 – 0.0032) 0.15 (0.006)
Ring end gap Top 0.200 – 0.350 (0.0079 – 0.0138) 1.0 (0.04)
Second 0.350 – 0.500 (0.0138 – 0.0197) 1.0 (0.04)
Oil (side rail) 0.10 – 0.35 (0.004 – 0.014) 1.0 (0.04)
Ring width Top 0.925 – 0.945 (0.0364 – 0.0372) 0.905 (0.0356)
Second 0.940 – 0.960 (0.0370 – 0.0378) 0.92 (0.036)
Connecting
rod
Small end I.D. 18.005 – 18.020 (0.7089 – 0.7094) 18.07 (0.711)
Big end side clearance 0.1 – 0.4 (0.004 – 0.016) 1.1 (0.04)
Big end I.D. 30.020 – 30.033 (1.1819 – 1.1824) 30.066 (1.1837)
Big end oil clearance 0.040 – 0.063 (0.0016 – 0.0025) 0.12 (0.005)
Crankshaft Crankpin O.D. 29.970 – 29.980 (1.1799 – 1.1803) 29.92 (1.178)
Crankshaft runout – 0.10 (0.004)
Cylinder barrel Camshaft journal I.D. 14.000 – 14.018 (0.5512 – 0.5519) 14.048 (0.5531)
Crankcase
cover
Camshaft journal I.D.
14.000 – 14.018 (0.5512 – 0.5519) 14.048 (0.5531)
Valves Valve clearance IN 0.08 ± 0.02 (0.003 ± 0.001) –
EX 0.10 ± 0.02 (0.004 ± 0.001) –
Valve stem O.D. IN 5.468 – 5.480 (0.2153 – 0.2157) 5.318 (0.2094)
EX 5.425 – 5.440 (0.2136 – 0.2142) 5.275 (0.2077)
Valve guide I.D. IN/EX 5.500 – 5.512 (0.2165 – 0.2170) 5.572 (0.2194)
Guide-to-stem
clearance
IN 0.020 – 0.044 (0.0008 – 0.0017) 0.10 (0.004)
EX 0.060 – 0.087 (0.0024 – 0.0034) 0.12 (0.005)
Valve guide
installation height
IN 4.8 – 5.2 (0.19 – 0.20) –
Valve seat width IN 0.70 – 0.90 (0.028 – 0.035) 2.0 (0.08)
EX 0.90 – 1.10 (0.035 – 0.043) 2.0 (0.08)
Valve spring free length 30.5 (1.20) 29.0 (1.14)
Valve spring perpendicularity – 1.5° max.
Camshaft Cam height IN/EX 27.603 – 27.703 (1.0867 – 1.0907) 27.450 (1.0807)
Camshaft O.D. 13.966 – 13.984 (0.5498 – 0.5506) 13.916 (0.5479)
Carburetor Main jet #68 –
Pilot screw opening 1-7/8 turns out –
Float height 13.7 (0.54) –
Spark plug Gap 0.70 – 0.80 (0.028 – 0.031) –
Spark plug cap Resistance (20°C/68°F) 7.5 – 12.5 k
Ω
–
Ignition coil Air gap 0.2 – 0.6 (0.01 – 0.02) –
Primary resistance 0.6 – 0.9
Ω
–
Secondary resistance 5.6 – 6.9 k
Ω
–