Velocette Thruxton Endurance (1969)

The Velocette Thruxton Endurance was a motorcycle produced in 1969, with only 121 units produced. It had a 499cc four-stroke, single cylinder, OHV engine with a compression ratio of 8:1 and a maximum power of 25kW/34hp at 6200 rpm. The motorcycle had a 4-speed constant mesh, close ratio transmission and a chain final drive. It also had a tubular cradle frame and a rear sub-frame that was detachable. The dimensions of the bike were 2260 mm in length, 760 mm in width and 1130 mm in height, with a wheelbase of 1365 mm and ground clearance of 165 mm. The motorcycle had a telescopic fork with hydraulic damping and an offset wheel spindle for its front suspension, and Woodhead-Monroe springs with hydraulic damping for its rear suspension. The bike had front and rear drum brakes of 7 x 1 in. and wheels of WM1 x 21 in. and WM3 x 19 in. for the front and rear wheels respectively. The front and rear tires were Trials Universals of 3.00 x 21 and 4.00 x 19. The fuel capacity was 11.35 L or 3 US gallons, and the dry weight was 170 kg or 375 lbs. The bike was produced in black with a silver tank. The ignition was with Miller D6 with auto volt regulation and it had a 6V 60W battery. It could be started with a kick start, and had a seat height of 838 mm. The motorcycle used an Amal 10TT9 Monobloc carburetor and a single exhaust with a Champion N3 or N4 spark plug.

Technical specifications:

Make Model: Velocette Thruxton Endurance

Year: 1969

Production: 121 units
Engine: Four stroke, single cylinder, OHV
Capacity: 499 cc / 30.5 cub in
Bore x Stroke: 86 x 86 mm
Compression Ratio: 8:1
Cooling System: Air cooled
Lubrication: Dry sump
Carburetor: Amal 10TT9 Monobloc
Exhaust: Single
Spark Plug: Champion N3 or N4
Ignition: Miller D6 with auto volt regulation
Battery: 6V 60W
Starting: Kick start
Max Power: 25 kW / 34 hp @ 6200 rpm
Transmission: 4 Speed constant mesh, close ratio

Gear Ratios: 1st 11.2 / 2nd 7.7 / 3rd 5.87 / 4th 4.87:1
Final Drive: Chain
Frame: Tubular cradle, rear sub-frame detachable
Dimensions: Length: 2260 mm / 89.0 in Width: 760 mm / 30.0 in Height: 1130 mm / 44.5 in
Wheelbase: 1365 mm / 53.75 in
Ground Clearance: 165 mm / 6.5 in
Seat Height: 838 mm / 33 in
Front Suspension: Telescopic fork with hydraulic damping and an offset wheel spindle
Rear Suspension: Woodhead-Monroe springs with hydraulic damping, later Armstrong and Girling
Front Brakes: 7 x 1 in., drum
Rear Brakes: 7 x 1 in., drum
Front Wheel: WM1 x 21 in
Rear Wheel: WM3 x 19 in
Front Tyre: 3.00 x 21 Trials Universal
Rear Tyre: 4.00 x 19 Trials Universal
Dry Weight: 170 kg / 375 lbs
Fuel Capacity: 11.35 L / 3 US gal
Colours: Black with silver tank
Source: Bonhams

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