Honda GXR120RT, Руководство пользователя

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2-2
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SERVICE INFORMATION
SERVICE INFORMATION
MAINTENANCE STANDARDS
Unit: mm (in)
Part Item Standard Service limit
Engine Maximum speed (at no load)
4,100 ± 100 min -1 (rpm)
–
Idle speed
1,850 ± 150 min
-1
(rpm)
–
Cylinder compression
0.50 MPa (5.1 kgf/cm
2
, 73 psi)/
700 min
-1
(rpm)
–
Cylinder block Sleeve I.D. 60.000 – 60.015 (2.3622 – 2.3628) 60.165 (2.3687)
Piston Skirt O.D. 59.971 – 59.985 (2.3611 – 2.3616) 59.870 (2.3571)
Piston-to-cylinder clearance 0.015 – 0.044 (0.0006 – 0.0017) 0.100 (0.0039)
Piston pin bore I.D. 13.002 – 13.012 (0.5119 – 0.5123) 13.048 (0.5137)
Piston pin Pin O.D. 12.994 – 13.000 (0.5116 – 0.5118) 12.954 (0.5100)
Piston pin-to-piston pin bore
clearance
0.002 – 0.018 (0.0001 – 0.0007) 0.080 (0.0031)
Piston rings Ring side
clearance
Top 0.015 – 0.054 (0.0006 – 0.0021) 0.12 (0.0047)
Second 0.030 – 0.069 (0.0012 – 0.0027) 0.14 (0.0055)
Ring end gap Top 0.15 – 0.30 (0.0059 – 0.0118) 0.60 (0.0236)
Second 0.40 – 0.55 (0.0157 – 0.0217) 0.85 (0.0335)
Oil (side rail) 0.2 – 0.7 (0.01 – 0.03) 1.0 (0.04)
Ring width Top 0.970 – 0.990 (0.0382 – 0.0390) 0.940 (0.0370)
Second 1.155 – 1.175 (0.0455 – 0.0463) 1.125 (0.0443)
Connecting rod Small end I.D. 13.005 – 13.020 (0.5120 – 0.5126) 13.070 (0.5146)
Big end I.D. 26.020 – 26.033 (1.0244 – 1.0249) 26.06 (1.0260)
Big end side clearance 0.1 – 0.5 (0.004 – 0.020) 0.90 (0.0354)
Big end oil clearance 0.040 – 0.063 (0.0016 – 0.0025) 0.12 (0.0047)
Crankshaft Crankpin O.D. 25.970 – 25.980 (1.0224 – 1.0228) 25.920 (1.0205)
Crankshaft runout – 0.10 (0.004 in)
Valves Valve clearance IN 0.15 ± 0.04 (0.006 ± 0.002) –
EX 0.20 ± 0.04 (0.008 ± 0.002) –
Valve stem O.D. IN 3.970 – 3.985 (0.1563 – 0.1569) 3.900 (0.1535)
EX 3.935 – 3.950 (0.1549 – 0.1555) 3.880 (0.1528)
Valve guide Valve guide I.D. IN/EX 4.000 – 4.018 (0.1575 – 0.1582) 4.060 (0.1598)
Guide-to-stem
clearance
IN 0.015 – 0.048 (0.0006 – 0.0019) 0.098 (0.0039)
EX 0.050 – 0.083 (0.0020 – 0.0033) 0.120 (0.0047)
Valve guide
installation height
IN 7.5 (0.2953) –
Valve seat width IN/EX 0.70 (0.0276) 1.800 (0.0709)
Valve spring Valve spring free
length
IN/EX 25.8 (1.0157) 24.900 (0.9803)
Cam pulley Cam height 36.483 (1.4363) 35.483 (1.3970)
Cam pulley I.D. 10.057 – 10.087 (0.3959 – 0.3971) 10.105 (0.3978)
Cam pulley shaft O.D. 9.972 – 9.987 (0.3926 – 0.3932) 9.920 (0.3906)
Rocker arm Rocker arm I.D. 6.000 – 6.018 (0.2362 – 0.2369) 6.043 (0.2379)
Rocker arm shaft O.D. 5.960 – 5.990 (0.2346 – 0.2358) 5.953 (0.2344)
Rocker arm shaft journal I.D. 6.000 – 6.018 (0.2362 – 0.2369) 6.043 (0.2379)
Carburetor
(Float type)
Main jet BF33S A #60 –
BF33R A #60 –
Pilot screw
opening
BF33S A 3-1/2 turns out –
BF33R A 3-3/8 turns out –
Float height 15.7 (0.62) –
Carburetor
(Floatless type)
Main jet #48 –
Pilot screw opening 2-3/4 turns out –
Spark plug Gap 0.60 – 0.70 (0.024 – 0.028) –
Ignition coil Resistance Primary
resistance
0.75 – 0.92 Ω –
Secondary
resistance
6.1 – 9.3 k Ω –
Air gap 0.2 – 0.5 (0.01 – 0.02) –