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Honda SL 125

Make Model	Honda SL 125
Year	1972 - 73
Engine	Four stroke, single cylinder. OHC, 2 valve
Capacity	125 cc / 7.4 cu-in
Bore x Stroke	56.0 x 49.5 mm
Cooling System	Air cooled
Compression Ratio	9.5:1
Lubrication	Wet sump
Induction	Keihin Carburetor
Ignition	Points and Condensor
Starting	Kick
Max Power	12 hp / 8.8 kW @ 7900 rpm
Clutch	Wet plate
Transmission	5 Speed
Final Drive	Chain
Front Suspension
Rear Suspension	Dual shocks
Front Brakes	Drum
Rear Brakes	Drum
Front Tyre	2.75-21
Rear Tyre	3.25-18
Wet Weight	108.0 kg / 238.1 lbs
Fuel Capacity	7.5 Litres / 1.9 gal

The outstanding qualities of the SL125, one of Honda's earliest trail bikes, were confined to the engine, which was quiet, powerful and extremely reliable. Handling, helped by the bike's light weight, was fair — certainly not outstanding. Later, with the XL series, the makers improved the ride by fitting better-quality forks and rear-suspension units; for the engine the main change was a detachable rocker box in place of the original integral design.
Silencing was extremely efficient, the exhaust being inaudible at 30ft.