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Matchless G90 Super Clubman 500

Make Model	Matchless G90 Super Clubman
Year	1936 - 39
Engine	Single cylinder, twin port
Capacity	498 cc / 30.4 cub in.
Bore x Stroke	82.5 x 90 mm
Cooling System	Air cooled
Compression Ratio	7.5:1
Lubrication	Dry sump
Oil Capacity	2.8 L / 6.0 US pints
Exhaust	Single, chrome
Ignition	Magneto, Lucas
Starting	Kick
Battery	Lucas, 6V 12 Ah
Spark Plug	Lodge H53
Maximum Power	3.7 kW / 5 hp
Clutch	5-Plate
Transmission	4-Speed
Final Drive	Chain
Gear Ratios	1st 3.16 / 2nd 2.08 / 3rd 1.1.51 / 4th 1.0:1
Frame	Single top and down pipe, double cradle
Front Suspension	Coil springs
Rear Suspension	None, Spring loaded saddle
Front Brakes	Drum
Rear Brakes	Drum
Wheels	Steel, wire spokes
Fuel Capacity	9.1 L / 2.4 US gal
Top Speed	145 km/h / 90 mph

In the 1936 model range two distinct groups of single-cylinder models were introduced, the “Clubman” range for the sportsmen and the “Tourist” range for the less hurried enthusiasts.
There were no less than four 500cc Clubman models, all with twin port engine and hairpin valve springs.
The fastest model was the “Super Clubman”: it had a specially tuned engine with high compression piston, 14 mm spark plug and specially polished components such as flywheels, conrods and ports.
The compression ratio was 7.5:1 and the top speed was 90 mph.