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BSA Super Rocket (A10)

Make Model	BSA Super Rocket
Year	1959 - 63
Engine	Four stroke, parallel twin cylinder, OHV
Capacity	646cc / 39.4 cub in.
Bore x Stroke	70 x 84 mm
Carburetor	Amal TT racing
Cooling System	Air cooled
Compression Ratio	8.3:1
Lubrication	Dry sump
Exhaust	Twin, stainless steel
Ignition	Lucas magneto
Battery	6V
Starting	Kick start
Max Power	37 kW / 50 hp @ 6250 rpm
Clutch	Multi-plate with built-in cush drive
Transmission	4 Speed
Final Drive	Chain
Gear Ratio	1st 11.68 / 2nd 7.96 / 3rd 5.48 / 4th 4.53:1
Frame	Welded seamless steel tubing with duplex downtubes and full cradle engine support, bolted-on rear sub frame
Front Suspension	Telescopic forks with coil spring - hydraulically damped
Rear Suspension	Swinging arm
Front Brakes	Drum, 8 in.
Rear Brakes	Drum, 7 in.
Braking Distance (both wheels from 32 km/h / 20 mph	4 m / 13 ft
Wheels	Steel, wire spokes
Front Tyre	3.25 x 19 in., ribbed
Rear Tyre	4.00 x 19 in.
Dimensions	Length: 2100 mm / 84.0 in.
Wheelbase	1391 mm / 54.75 in.
Wet Weight	170 kg / 375 lbs
Fuel Capacity	16 L / 4.2 US gal
Average Fuel Consumption	4.7 L/100 km / 21.3 km/l / 50 US mpg
Top Speed	187 km/h / 116 mph
Standing Quarter Mile (400 m)	14.1 sec.

The Super Rocket has a near-three-figure cruising speed – a performance to meet the autobahn ambitions of foreign-touring enthusiasts, or those who buy motorcycles with an optimistic eye to the extension of motorway travel at home in the not too distant future. On the other hand, the current model can be throttled back to accept happily the inevitable limitations of built-up-area riding. In these less spectacular circumstances, one's patience in jogging along at 30mph is rewarded by a remarkable - for a lusty 650cc twin - fuel consumption also in the three-figure class.' - Motor Cycling.

BSA's range for 1955 embodied several novel features. Alongside the existing plunger-framed machines were new models equipped with swinging-arm rear suspension, while the A7 Shooting Star and A10 Road Rocket sports twins came with new aluminium-alloy cylinder heads. The latter produced a highly respectable 40bhp, and as tested by Motor Cycling magazine was found capable of reaching 109mph. For 1958 the sports 650 became the Super Rocket, gaining a revised cylinder head, Amal Monobloc carburettor and an extra 3bhp. The model lasted into the unitary construction era and was last produced in 1963.