BSA Sunbeam (1959-61)

The BSA Sunbeam (Triumph Tigress) is a motorcycle produced from 1959 to 1961 with a twin 4-stroke engine and a capacity of 250 cc. There is also a 175 cc version available. The carburetor used is a Zenith 18 MXZ and the cooling system is air cooled. The lubrication is dry sump with an oil capacity of 1.4 L. The exhaust is a single, stainless steel pipe and the ignition system is twin coil. The Sunbeam is equipped with a Champion L7 spark plug with a gap of 0.020 in. It has a 12V battery and uses a kick start (some models were fitted with an electric start) for starting. The clutch is a dry, single plate with a 4-speed transmission and a chain final drive. The frame is made of pressed sheet metal and the front suspension has 2 telescopic legs mounted side by side on the left-hand side while the rear suspension is a swinging arm. The front and rear brakes are both drums, and the wheels are steel and interchangeable. The average fuel consumption is 2.4 L/100 km and the top speed is 97 km/h. It comes in two colours: polychromatic green and red/beige.

Technical specifications:

Make Model: BSA Sunbeam (Triumph Tigress)

Year: 1959 – 61
Engine: Twin, 4-stroke (175cc: single, 2-stroke)
Capacity: 250 cc / 15.3 cub in. (also in 175 cc /10.7 cub in.)
Carburetor: Zenith 18 MXZ
Cooling System: Air cooled
Lubrication: Dry sump
Oil Capacity: 1.4 L / 3 US pints
Exhaust: Single, stainless steel
Ignition: Twin coil
Spark Plug: Champion L7, gap 0.020 in.
Battery: 12V
Starting: Kick start (some fitted with electric starter)
Clutch: Dry single plate
Transmission: 4 Speed, foot operated
Final Drive: Chain
Frame: Pressed sheetmetal
Front Suspension: 2 telescopic legs mounted side by side on the LHS
Rear Suspension: Swinging arm
Front Brakes: Drum
Rear Brakes: Drum
Wheels: Steel, interchangeable
Front Wheel: 10 in.
Rear Wheel: 10 in.
Fuel Capacity: 6.8 L / 1.8 US gal
Average Fuel Consumption: 2.4 L/100 km / 41. 7 km/l / 98 US mpg
Top Speed: 97 km/h / 60 mph
Colours: Polychromatic green, Red/beige
Review: Wikipedia