BSA Rocket 3: history, specs, pictures

From CycleChaos
Jump to navigation Jump to search

1969 BSA A75 Rocket 3.jpg
BSA Rocket 3
Also called A75
Production 1968 - 1969
Class Road
in-line three, four-stroke
Bore / Stroke 67.0mm x 70.0mm
Top Speed 115 mph (185 km/h)
Horsepower 56.73 HP (42.3 KW) @ 7500RPM
Torque 44.99 ft/lbs (61.0 Nm) @ 6900RPM
Fuel System carburetor. amal
Ignition twin coil
Transmission Gear box: 4-speed

Final Drive: chain

Clutch: dry single plate
Suspension Front: telescopic
Rear: swingarm with coil-over shocks
Brakes Front: expanding brake (drum brake)
Rear: expanding brake (drum brake)
Front Tire 4.10-19
Rear Tire 4.10-19
Wheelbase 56.3 inches (1430 mm)
Weight 454.15 pounds (206.0 Kg) (dry), 226.0 kg (wet)
Oil Capacity 0.74 Gallon (2.80 Liters)
Fuel Capacity 5.02 Gallon (19.00 Liters)
Fuel Consumption 6.72 liters/100 km (14.9 km/l or 35.00 mpg)
Manuals Service Manual

The BSA Rocket 3 is a 750cc, triple cylinder, four stroke, street motorcycle manufactured by BSA. It is also called the A75 following BSA's A series of designations. Max torque was 44.99 ft/lbs (61.0 Nm) @ 6900 RPM. Claimed horsepower was 56.73 HP (42.3 KW) @ 7500 RPM.

The BSA version of the three cylinder model is distinguishable from the Triumph Trident in that the cylinders on the BSA are inclined forward. These multi cylinder machines were designed to be the flagships of the BSA/Triumph group but they were introduced too late, being outclassed by the Honda CB750K four cylinder. Any other year it would have been met with great applause, but the Honda stole most of its thunder. While the performance was good for the time, the styling was too radical, which resulted in disappointing sales. The Trident outsold the Rocket 3 five to one, so first year models of the Rocket 3 are comparatively rare.

Engine[edit | edit source]

The engine was a air cooled in-line three, four-stroke. A 67.0mm bore x 70.0mm stroke result in a displacement of just 740.0 cubic centimeters. Fuel was supplied via a overhead valves (ohv).

Drive[edit | edit source]

The bike has a 4-speed transmission. Power was moderated via the dry single plate.

Chassis[edit | edit source]

It came with a 4.10-19 front tire and a 4.10-19 rear tire. Stopping was achieved via expanding brake (drum brake) in the front and a expanding brake (drum brake) in the rear. The front suspension was a telescopic while the rear was equipped with a swingarm with coil-over shocks. The Rocket 3 was fitted with a 5.02 Gallon (19.00 Liters) fuel tank. The bike weighed just 454.15 pounds (206.0 Kg). The wheelbase was 56.3 inches (1430 mm) long.

1969[edit | edit source]

1971[edit | edit source]

1971 BSA Rocket 3 in Red
1971 BSA Rocket 3 in Red
1971 BSA Rocket 3 in Red
1971 BSA Rocket 3 in Red

In Media[edit | edit source]

References[edit | edit source]