Matchless G12 (1958-66)

The Matchless G12 (1958-66) is a twin cylinder motorcycle with a capacity of 646 cc / 39.4 cub in. It has a double cradle frame and a teledraulic fork front suspension with a swingarm and twin shocks, Girling rear suspension. It also features a 4-speed transmission with a chain, 97 links final drive, drum brakes with 7in. sls both front and rear, and steel wire spoke wheels with a front tyre of 3.25 x 19 in. and a rear tyre of 3.50 x 19 in. The motorcycle has a dry weight of 180 kg / 396 lbs and a fuel capacity of 17 L / 4.5 US gal.

The engine has a compression ratio of G12/de Luxe at 7.5:1, while the CS/CSR has a 8.5:1 ratio, with a lubrication system of dry sump and an oil capacity of 2.5 L / 5.3 US pints. The twin chrome exhaust and Amal 389, 1-1/8 fuel system is regulated by a Lucas K2F ignition and is started by kick. The battery is Lucas 6V, 12Ah, and the spark plug for G12/de Luxe/CS is KLG FE80, with a 14 mm thread and 3/4 in. reach, while the CSR’s spark plug is KLG FE220, again with a 14 mm thread and 3/4 in. reach.

With a maximum power output of 26kW / 35 hp @ 6500 rpm, the Matchless G12 (1958-66) has an average consumption of 4.3 L/100 km / 23.4 km/l / 55 US mpg and a top speed of 153 km/h / 95 mph. The motorcycle is available in black with chrome tank panels. The information is sourced from Wikipedia.

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Technical specifications:

Make Model: Matchless G12 (all models)

Year: 1958 – 66

Engine: Twin cylinder

Capacity: 646 cc / 39.4 cub in.

Bore x Stroke: 72 x 79.3 mm

Cooling System: Air cooled

Compression Ratio: G12/de Luxe: 7.5:1 CS/CSR: 8.5:1

Lubrication: Dry sump

Engine Oil: Hot: SAE 50 Cold: SAE 30 Extremely cold: SAE 20

Oil Capacity: 2.5 L / 5.3 US pints

Exhaust: Twin, chrome

Fuel System: Amal 389, 1-1/8

Ignition: Lucas K2F

Starting: Kick

Battery: Lucas 6V, 12Ah

Spark Plug: G12/de Luxe/CS: KLG FE80, 14 mm thread, 3/4 in. reach CSR: KLG FE220, 14 mm thread, 3/4 in. reach

Transmission: 4-Speed

Final Drive: Chain, 97 links

Internal Gear Ratios: 1st 2.56 / 2nd 1.70 / 3rd 1.22 / 4th 1.00:1

Maximum Power: 26 kW / 35 hp @ 6500 rpm

Frame: Double cradle

Front Suspension: AMC teledraulic fork

Rear Suspension: Swingarm with twin shocks, Girling

Front Brakes: Drum, 7in. sls

Rear Brakes: Drum, 7in. sls

Wheels: Steel, wire spokes

Front Tyre: 3.25 x 19 in.

Rear Tyre: 3.50 x 19 in.

Dry Weight: 180 kg / 396 lbs

Fuel Capacity: 17 L / 4.5 US gal

Average Consumption: 4.3 L/100 km / 23.4 km/l / 55 US mpg

Top Speed: 153 km/h / 95 mph

Colours: Black with chrome tank panels

Source: Wikipedia