1970 Honda SL350



1969-1972 Honda SL350 Full Specifications

Get to know the 1969-1972 Honda SL350 in exquisite detail with our meticulously crafted motorcycle specifications tables.

Click or tap on a navigation pane below to find your way through our highly detailed, categorised 1969-1972 Honda SL350 specifications.


Performance Specifications Table

Climbing ability25 o
Fuel consumption115 mpg (average)
Braking distance15.0 m @ 31 mph
Minimum turing radius4,200 mm

Dimensions Specifications Table

Overall length2,020 mm
Overall width845 mm
Overall height1,180 mm
Wheelbase1,340 mm
Seat height840 mm
Footpeg height320 mm
Ground clearance210 mm
Wet weight165 kg (fuel and fluids)

Frame Specifications Table

Frame typeSemi-double, cradle
Rake / Caster angle62 °
Trail length110 mm

Engine Specifications Table

Power33 bhp @ 9,500 rpm
Torque26.7 Nm @ 8,000 rpm
Engine capacity / displacement325 cc
Engine configurationTwin cylinder, OHC
ArrangementTwo cylinders in tandem
Bore and Stroke64.0 mm x 50.6 mm
Compression ratio9.5 : 1
Electric startyes
Engine weight54 Kg (dry)

Valves and Springs Specifications Table

Intake valve clearance0.01 mm - 0.035 mm
Intake valve lift6.876 mm
Intake valve concentricty of valve facewithin 0.03 mm
Intake valve stem diameter6.975 mm - 6.99 mm
6.955 mm (service limit)
Intake valve guide diamater7.00 mm - 7.01 mm (bore)
Intake valve guide diameter7.05 mm (bore service limit)
12.56 mm - 12.57 mm (outer)
Intake valve length98.05 mm - 98.35 mm
97.65 mm (service limit)
Intake valve head thickness0.85 mm - 1.15 mm
0.6 mm (service limit)
Exhaust valve clearance0.03mm - 0.046 mm
Exhaust valve lift6.869 mm
Exhaust valve concentricty of valve facewithin 0.03 mm
Exhaust valve stem diameter6.955 mm - 6.97 mm
6.935 mm (service limit)
Exhaust valve guide diameter7.00 mm - 7.01 mm (bore)
7.05 mm (bore service limit)
12.56 mm - 12.57 mm (outer)
Exhaust valve length96.63 mm - 96.93 mm
96.23 mm (service limit)
Exhaust valve head thickness0.85 mm - 1.15 mm
0.6 mm (service limit)
Intake valve spring free length49.0 mm (outer spring)
47.8 mm (outer spring service limit)
39.8 mm (inner spring)
39.3 mm (inner spring service limit)
Intake valve fitted load62.6 kg - 72.0 kg (valve closed)
Exhaust valve spring free length49.0 mm (outer spring)
47.8 mm (outer spring service limit)
39.8 mm (inner spring)
39.3 mm (inner spring service limit)
Exhaust valve fitted load30.5 kg - 35.1 kg (valve closed)

Valve Train Specifications Table

Layoutoverhead camshaft
Drive typechain driven
Rocker diameter13.0 mm - 13.027 mm (bore)

Cylinder and Piston Specifications Table

Cylinder bore diameter64.01 mm - 64.02 mm (bore)
64.11 mm (bore service limit)
Cylinder out of round0.05 mm (service limit)
Cylinder taper0.05 mm (service limit)
Piston diameter63.97 mm - 63.99 mm (outer)
Top piston ring to groove clearance0.03 mm - 0.06 mm
0.18 mm (service limit)
Second piston ring to groove clearance0.015 mm - 0.045 mm
0.165 mm (service limit)
Piston pin diameter14.994 mm - 15.00 mm
Piston pin bore diameter15.002 mm - 15.008 mm
15.05 mm (service limit)
Piston ring oil groove width0.015 mm - 0.045
Top piston ring end gaps0.2 mm - 0.4 mm
0.08 mm (service limit)
Second piston ring end gaps0.2 mm - 0.4 mm
0.08 mm (service limit)

Clutch and Primary Drive Specifications Table

Reduction ratio3.714 : 1
Clutch typeMulti-plate, wet
Clutch spring free length31.94 mm
30.5 mm (service limit)
Plate warpage0.3 mm (service limit
Friction plate thickness2.62 mm - 2.78 mm
2.3 mm (service limit)

Transmission Specifications Table

Type5 speed, constant mesh
Gear ratio1st gear = 2.353 : 1
2nd gear = 1.636 : 1
3rd gear = 1.269 : 1
4th gear = 1.036 : 1
5th gear = 0.900 : 1

Final Drive Specifications Table

Final driveChain
Final drive ratio2.250

Lubrication Specifications Table

System typeForced pressure and wet sump
Oil capacity2.0 litres (dry fill)

Cooling System Specifications Specifications Table

System typeAir cooled

Fuel System Specifications Table

Fuel typeunleaded 95 RON
Fuel tank capacity9.0 litres
Reserve fuel tank capacity2.0 litres

Carburetion Specifications Table

Carburetor typeConstant velocity
Carburetor manufacturerKeihin

Ignition System Specifications Table

Spark plug typeNGK B-8ES

Front Suspension and Steering Specifications Table

TypeTelescopic fork

Rear Suspension Specifications Table


Front Brake Specifications Table

Front brake typeInternal expansion

Rear Brake Specifications Table

Rear brake typeInternal expansion

Wheels and Tyres Specifications Table

Front wheel size19 inch
Front tyre size3.25-19 (4PR)
Rear wheel size18 inch
Rear tyre size4.00-18 (4PR)

Electrical Charging Specifications Table

Battery voltage rating12 volts DC
Battery capacity12 ampere hour (Ah)

Electrical Equipment Specifications Table

Headlight12V - 35/25W high/low beam
Tail / stop light12V -7/23W


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  1. BillSF9c

    I was thrilled to find a spec site for the SL350… but yours is lacki g for the 69 and downright totally lost for the 70, on.

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