Honda HHT25S Manual page 15

SERVICE INFORMATION
5. SERVICE SPECIFICATIONS
HHT25S
Part
Idle speed
Engine
Cylinder compression
Cylinder Sleeve I.D.
Skirt O.D.
Piston Piston-to-cylinder clearance
Piston pin bore I.D.
Pin O.D.
Piston pin Piston pin-to-piston bore
clearance
Ring width:
Piston rings Ring side clearance:
Ring end gap:
Connecting rod Small end I.D.
Valve clearance (cold):
Stem OD:
Valves
Guide ID:
Stem-to-guide clearance:
Valve spring free length
Cam height
Cam pulley Cam pulley I.D.
Cam pulley shaft O.D.
Cylinder barrel Barrel I.D. (Cam pulley bearing)
Carburetor Main jet
Spark plug Gap
Resistance:
Ignition coil
Flywheel air gap
Clutch Lining thickness
2-4
Item
3,100 ± 200 rpm
0.90 ~ 1.10 Mpa (131 ~ 159 psi) at 2,000 min
35.000 - 35.015 mm (1.378 - 1.379 in)
34.970 - 34.990 mm (1.377 - 1.378 in)
0.010 - 0.045 mm (0.0004 - 0.0018 in)
8.010 - 8.026 mm (0.3154 - 0.3160 in)
7.994 - 8.000 mm (0.3147 - 0.3150 in)
0.010 - 0.032 mm (0.0004 - 0.0013 in)
top/second 0.970 - 0.990 mm (0.0382 - 0.0390 in)
top/second 0.015 - 0.056 mm (0.0006 - 0.0022 in)
top/second 0.10 - 0.25 mm (0.004 - 0.010 in)
7.978 - 7.989 mm (0.3141 - 0.3145 in)
IN 0.08 ± 0.02 mm
EX 0.11 ± 0.02 mm
IN 3.470 - 3.485 mm (0.1366 - 0.1372 in)
EX 3.435 - 3.450 mm (0.1352 - 0.1358 in)
IN/EX 3.500 - 3.518 mm (0.1378 - 0.1385 in)
IN 0.015 - 0.048 mm (0.0006 - 0.0019 in)
EX 0.050 - 0.083 mm (0.0020 - 0.0033 in)
20.66 mm (0.8134 in)
22.097 mm (0.870 in)
4.020 - 4.050 mm (0.1583 - 0.1595 in)
3.990 - 4.000 mm (0.1571 - 0.1575 in)
4.000 - 4.018 mm (0.1575 - 0.1582 in)
#34
0.6 - 0.7 mm (0.024 - 0.028 in)
0.75 - 0.92 Ω
Primary coil
Secondary coil 6.1 - 9.3 kΩ
0.3 - 0.5 mm (0.012 - 0.020 in)
2.0 mm (0.08 in)
Standard
-1
(rpm)
HHT25S•HHT35S
Service Limit
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35.100 mm (1.3819 in)
34.900 mm (1.3740 in)
0.120 mm (0.0047 in)
8.060 mm (0.3173 in)
7.950 mm (0.3130 in)
0.070 mm (0.0028 in)
0.920 mm (0.0362 in)
0.120 mm (0.0047 in)
0.60 mm (0.024 in)
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3.400 mm (0.1399 in)
3.380 mm (0.1331 in)
3.560 mm (0.1402 in)
0.098 mm (0.0039 in)
0.120 mm (0.0047 in)
20.00 mm (0.7874 in)
21.797 mm (0.8581 in)
4.100 mm (0.1614 in)
3.950 mm (0.1555 in)
4.050 mm (0.1594 in)
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1.0 mm (0.04 in)