BSA A10 Road Rocket 650
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| BSA A10 Road Rocket 650 | |
| Manufacturer | |
|---|---|
| Production | 1954 - 58 |
| Engine | Four stroke parallel twin cylinder, OHV |
| Compression ratio | 7.2:1 |
| Top Speed | 175 km/h / 109 mph |
| Ignition | Lucas magdyno |
| Battery | 6V |
| Transmission | 4 Speed |
| Frame | Welded seamless steel tubing with duplex downtubes and full cradle engine support, bolted-on rear sub frame |
| Suspension | Front: Telescopic forks with coil spring - hydraulically damped Rear: None or Plunger-type, with shock and rebound springs, undamped. From 1954: Swinging arm |
| Brakes | Front: Drum, 8 in. Rear: Drum, 7 in. |
| Front Tire | 3.25 x 19 in., ribbed |
| Rear Tire | 4.00 x 19 in. |
| Wheelbase | 1391 mm / 54.75 in. |
| Weight | 190 kg / 418 lbs (dry), |
| Fuel Capacity | 16 L / 4.2 US gal |
| Manuals | Service Manual |
It could reach a top speed of 175 km/h / 109 mph.
Engine[edit | edit source]
The engine was a Air cooled cooled Four stroke parallel twin cylinder, OHV. The engine featured a 7.2:1 compression ratio.
Drive[edit | edit source]
Power was moderated via the Multi-plate with bult-in cush drive.
Chassis[edit | edit source]
It came with a 3.25 x 19 in., ribbed front tire and a 4.00 x 19 in. rear tire. Stopping was achieved via Drum, 8 in. in the front and a Drum, 7 in. in the rear. The front suspension was a Telescopic forks with coil spring - hydraulically damped while the rear was equipped with a None or Plunger-type, with shock and rebound springs, undamped. From 1954: Swinging arm. The A10 Road Rocket 650 was fitted with a 16 L / 4.2 US gal fuel tank. The bike weighed just 190 kg / 418 lbs. The wheelbase was 1391 mm / 54.75 in. long.
Photos[edit | edit source]
Overview[edit | edit source]
BSA Road Rocket
The A10 had a reputation
for reliability but was struggling to compete against the Triumph engines and
the Norton Featherbed frames. Advertised by BSA in 1954 as 'undoubtedly the
worlds greatest motorcycle' the Road Rocket was discontinued in 1958 when it was
replaced by the BSA Super Rocket.
Launched as the top of BSA's range in 1954 the BSA Road Rocket had an A10 engine with an alloy cylinder head, high compression pistons and a high lift camshaft, giving 40 bhp (30 kW) and a top speed of 109 mph (175 km/h).
| Make Model | BSA Road Rocket |
|---|---|
| Year | 1954 - 58 |
| Engine Type | Four stroke parallel twin cylinder, OHV |
| Displacement | 646 cc / 39.4 cub in. |
| Bore X Stroke | 70 x 84 mm |
| Carburetor | Amal |
| Cooling System | Air cooled |
| Compression | 7.2:1 |
| Lubrication | Dry sump |
| Exhaust | Twin, stainless steel |
| Ignition | Lucas magdyno |
| Battery | 6V |
| Starting | Kick start |
| Max Power | 30 kW / 40 hp @ 6000 rpm |
| Clutch | Multi-plate with bult-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 | None or Plunger-type, with shock and rebound springs, undamped. From 1954: Swinging arm |
| Front Brakes | Drum, 8 in. |
| Rear Brakes | Drum, 7 in. |
| Wheels | Steel, wire spokes |
| Front Tire | 3.25 x 19 in., ribbed |
| Rear Tire | 4.00 x 19 in. |
| Dimensions | Length: 2100 mm / 84.0 in. |
| Wheelbase | 1391 mm / 54.75 in. |
| Dry Weight | 190 kg / 418 lbs |
| Fuel Capacity | 16 L / 4.2 US gal |
| Average Fuel Consumption | 5.6 L/100 km / 17.9 km/l / 42 US mpg |
| Top Speed | 175 km/h / 109 mph |
| Standing Quarter Mile (400 M) | 16 sec. |
| Colours | All over gold, Black/chrome |
| Source | Wikipedia |