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#002 BSA A65

wild mouse cycles - bsa a65 thunderbolt

De BSA Thunderbolt was een Britse motorfiets gemaakt door BSA in hun fabriek in Armory Road in Small Heath Birmingham tussen 1964 en 1972. De Thunderbolt heeft één carburateur en kon een maximale snelheid halen van 160km/h.

History

Het BSA-ontwikkelteam besloot de kosten laag te houden door de beproefde enkelzijdige voorrem van de BSA Gold Star en race-nokkenas van de BSA Lightning opnieuw te gebruiken. Uitgerust met 12 volt, een Zener diodespanningsregelaar en dubbele spoelontsteking, verkocht de Thunderbolt goed in de belangrijke Amerikaanse importmarkt en met de 3,5-imperial-gallon (16 l; 4.2 US gal) brandstoftank gaf een bereik van 210 mijl (340 km).

From 1968 the Thunderbolt benefited from a number of minor improvements including a longer kick start to make starting easier and metal tank badges to replace the earlier plastic ones, which had a tendency to crack. An Amal Concentric Float carburettor dealt with the problems of fuel flooding experienced with the earlier monobloc carburettor, by having the float bowl arranged centrally around (concentric with, hence the name) the main jet to remove the sensitivity to fuel surge inherent in all the earlier designs. Stiffer suspension improved cornering but poor quality control and production problems on the BSA assembly line with later models led to oil leaks and rusting parts which damaged the reputation of the Thunderbolt, which was already struggling to compete against the emerging Japanese motorcycles of the early 1970s (such as the Honda CB750) and production ended in 1972.

Project

  • BSA A65 T 1970 ingevoerd vanuit Nederland
  • Volledige rebuild
  • Kader, tank en zijpanelen gepoedercoat

Cycle Specs

  • Make Model : BSA A65 Thunderbolt
  • Year : 1970
  • Engine : OHV Parallel twin
  • Engine : OHV Parallel twin
  • Capacity : 654 cc / 39.9 cub in.
  • Bore x Stroke : 75 x 74 mm
  • Carburetors : Amal monobloc 389/67
  • Cooling System : Air cooled
  • Compression Ratio : 9.0:1
  • Lubrication : Dry sump
  • Engine Oil : SAE 20W/50
  • Oil Capacity : 3 L / 5 pints / 0.79 US gal
  • Exhaust : 2-into-1
  • Ignition : Twin coilSpark
  • Plug : Champion N4
  • Battery : 12V, 10 a.h., Lucas RM19
  • Starting : Kick start
  • Max Power : 35.8 kW / 49 hp @ 7000 rpm
  • Clutch : Multi-plate with bult-in cush drive
  • Transmission : 4 SpeedFinal
  • Drive : Chain
  • Gear Ratio : 1st 11.49 / 2nd 7.32 / 3rd 5.24 / 4th 4.58:1
  • Frame : Steel tubing, cradle
  • Front Suspension : Telescopic forks with coil spring – hydraulically damped
  • Rear Suspension : Coil spring/hydraulically damped
  • Front Brakes : 20.32 cm / 8 in., drum
  • Rear Brakes : 17.78 cm / 7In., drum
  • Wheels : Steel, wire spokes
  • Front Rim : WM2-18
  • Rear Rim : WM2-18
  • Front Tyre : 3.25 x 18 in., ribbed
  • Rear Tyre : 3.50 x 18 in., K70
  • Dimensions :
    Length: 2060 mm / 81.0 in.
    Width: 711 mm / 28 in.
    Height: 1010 mm / 39.8 in.
    Wheelbase:1370 mm / 54.5 in.
    Ground Clearance:  178 mm / 7.0 in.
    Seat Height: 813 mm / 32 in.
    Wet Weight: 177 kg / 397 lbs
    Fuel Capacity: Europe:18 L / 4.8 US gal
    Average Consumption : 4.7 L/100 km / 21.3 km/l / 50 mpg
    Top Speed: 174 km/h / 108 mph

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