Honda SH300 2009 User Manual

GENERAL INFORMATION
1-8
CYLINDER HEAD/VALVES SPECIFICATIONS
Unit: mm (in)
CYLINDER/PISTON SPECIFICATIONS
Unit: mm (in)
ITEM STANDARD SERVICE LIMIT
Cylinder compression at 450 min
-1
(rpm) 1,569 kPa (16.0 kgf/cm
2
, 228 psi) –
Camshaft Cam lobe height IN 39.325 – 39.485 (1.5482 – 1.5545) 39.295 (1.5470)
EX 37.034 – 37.194 (1.4580– 1.4643) 37.034 (1.4580)
Cylinder head warpage – 0.05 (0.002)
Rocker arm Arm I.D. IN/EX 13.000 – 13.018 (0.5118 – 0.5125) 13.10 (0.516)
Shaft O.D. IN/EX 12.966 – 12.984 (0.5105 – 0.5112) 12.91 (0.508)
Arm-to-shaft clear-
ance
IN/EX 0.016 – 0.052 (0.0006 – 0.0020) 0.08 (0.003)
Side spring free length 17.1 (0.67) 15.5(0.61)
Valve,
valve guide
Valve clearance IN 0.16 ± 0.03 (0.006 ± 0.001) –
EX 0.22 ± 0.03 (0.009 ± 0.001) –
Valve stem O.D. IN 4.475 – 4.490 (0.1762 – 0.1768) 4.465 (0.1758)
EX 4.465 – 4.480 (0.1758 – 0.1764) 4.455 (0.1754)
Valve guide I.D. IN/EX 4.500 – 4.512 (0.1772 – 0.1776) 4.54 (0.179)
Stem-to-guide clear-
ance
IN 0.010 – 0.037 (0.0004 – 0.0015) 0.08 (0.003)
EX 0.020 – 0.047 (0.0008 – 0.0019) 0.09 (0.004)
Valve guide projection
above cylinder head
IN 11.20 – 11.50 (0.441 – 0.453) –
EX 12.20 – 12.50 (0.480 – 0.492) –
Valve seat width IN/EX 0.90 – 1.10 (0.035 – 0.043) 1.5 (0.06)
Valve spring free length IN/EX 37.09 (1.460) 35.6 (1.40)
ITEM STANDARD SERVICE LIMIT
Cylinder I.D. 72.000 – 72.010 (2.8346 – 2.8350) 72.045 (2.8364)
Out-of-round – 0.05 (0.002)
Taper – 0.05 (0.002)
Warpage – 0.05 (0.002)
Piston,
piston pin,
piston ring
Piston O.D. at 10 (0.4) from bottom 71.97 – 71.99 (2.833 – 2.834) 71.90 (2.831)
Piston pin hole I.D. 17.002 – 17.008 (0.6694 – 0.6696) 17.03 (0.670)
Piston pin O.D. 16.994 – 17.000 (0.6691 – 0.6693) 16.98 (0.669)
Piston-to-piston pin clearance 0.002 – 0.014 (0.0001 – 0.0006) 0.02 (0.001)
Piston ring end gap Top 0.15 – 0.30 (0.006 – 0.012) 0.50 (0.019)
Second 0.30 – 0.45 (0.012 – 0.018) 0.65 (0.026)
Oil (side rail) 0.20 – 0.70 (0.008 – 0.028) 1.00 (0.039)
Piston ring-to-ring
groove clearance
Top 0.030 – 0.065 (0.0012 – 0.0026) 0.080 (0.0031)
Second 0.015 – 0.050 (0.0006 – 0.0020) 0.065 (0.0026)
Cylinder-to-piston clearance 0.010 – 0.040 (0.0004 – 0.0016) 0.10 (0.004)
Connecting rod small end I.D. 17.016 – 17.034 (0.6699 – 0.6706) 17.06 (0.672)
Connecting rod-to-piston pin clearance 0.016 – 0.040 (0.0006 – 0.0016) 0.06 (0.002)

Honda SH300 2009 Specifications

General

Displacement	279.1 cc
Bore x Stroke	72 mm x 68.5 mm
Compression Ratio	10.5:1
Fuel System	PGM-FI electronic fuel injection
Front Tire	110/70-16
Rear Tire	130/70-16
Width	730 mm
Height	1, 195 mm
Wheelbase	1, 420 mm
Engine Type	Liquid-cooled, 4-stroke, single-cylinder
Max Torque	26.5 Nm @ 6, 000 rpm
Transmission	V-Matic
Front Suspension	Telescopic fork, 35 mm
Rear Suspension	Twin shock absorbers
Front Brake	256mm hydraulic disc
Rear Brake	240 mm disc