1971 BSA B50 SS
1971 BSA B50SS BACKGROUND
The “SS” stands for “Street Scrambler”, and was intended as the full street version of the 500cc single-cylinder B50 line. BSA dipped into its parts bin, borrowing from the 1971-and-later BSA A65 for the front forks, triple clamps, brakes and lighting. All of this was added to the B50’s sturdy frame, which utilized a large-diameter backbone for both strength and to hold the engine oil, in lieu of a separate oil tank. A very shapely 2.4-gallon tank with a top-notch paint job topped of what was a very handsome machine. Some other things were done right too, like all the electrics being contained in one removable pod. The B50 in factory-racing form and bearing the hallowed name of “Gold Star”, earned some racing cred in the early 70s by winning the Thruxton 500, the Barcelona 24-hour, the Zolder 24-hour, and set a class lap record at the Isle of Man TT.
1971 BSA B50SS SPECIFICATIONS
Engine type Displacement Bore & Stroke Compression ratio Carburetor Ignition Horsepower output Torque output Primary drive Clutch Gearbox Final drive Battery Frame type Suspension, front Suspension, rear Brake, front Brake, rear Tire, front Tire, rear Wheelbase Length Width Height Ground Clearance Seat Height Dry Weight |
Air-cooled OHV 4-stroke single 499cc / 30.5 ci 84mm X 90mm 10.0:1 Amal 930/62 Lucas RM21 points & coil 34 hp @ 6200 rpm 28 lb/ft @ 5000 rpm Chain Multi-plate, wet 4-speed, right-foot shift Chain 12 volt Welded steel tubing, oil-in-backbone Telescopic forks, hydraulic damping Swing arm w/2 shock coil-over shocks 8-inch TLS drum, conical hub 7-inch SLS drum, conical hub 3.25″ X 18″ 3.50″ X 18″ 54.0 in / 1372mm 85.0 in / 2159mm 29.0 in / 737mm 43.5 in / 1105mm 7.0 in / 178mm 32.0 in / 813mm 310 lbs / 140.6 kg |