Engine
Type 2 cylinder four stroke boxer, air cooled
Capacity 582cc
Bore x stroke 74mm x 68mm
Power 19.5bhp @ 4500rpm
Compression 6.8:1
Carburettors 1, Zenith, 28 mm sidedraught
Valve design V-pattern overhead
Valve gear Gear-driven central camshaft. Push rods, rockers, tappets and springs
Electrics 12 volt, “Dynastart” system
Transmission
Clutch Dry single disc
Gearbox ratios
1st 3.54:1
2nd 1.94:1
3rd 1.27:1
4th 0.846:1
Axle ratio 5.43
Synchromesh 1st – 4th
Chassis
Frame Tubular & box section
Suspension Front: Leading trailing arms, coil springs and hydr. dampers
Rear: Trailing arms, coil springs and hydr. dampers
Steering Worm & nut
Brakes Front & rear: hydraulic
Handbrake: cable on rear wheels
Dimensions
Wheelbase 1700mm
Track front/rear 1220mm/1160mm
Length/width 2900mm x 1400mm
Tyres 5.20 x 10
General
Fuel capacity 23 litres
Max speed 64 mph
Number produced 34,318
Club Mailing Address
BMW Historic Motor Club
Lower Norgrove,
Yarrington Road,
Alfrick,
Worcestershire.
WR6 5EX