These are the known mechanical and performance specifications for your 1927 BMW R42.
Basic Specs
Engine
Displacement494.00 ccm (30.14 cubic inches)
Type
DetailsTwo cylinder boxer, four-stroke
Max RPM
Compression4.9:1
Bore/Stroke68.0 x 68.0 mm (2.7 x 2.7 inches)
Valves/Cylinder
FuelingCarburettor. 20mm BMW Spezial
Ignition
Exhaust
LubricationWet sump
CoolingAir
Drivetrain
Gearbox3-speed
Final DriveShaft drive (cardan)
ClutchDry-single plate-cable operated
Driveline
Performance
Horespower11.96 HP (8.7 kW)
Torque
Top Speed95.0 km/h (59.0 mph)
Fuel Economy & Polution
Fuel Consumption3.00 litres/100 km (33.3 km/l or 78.41 mpg)
Fuel Capacity
Emissions69.6 CO2 g/km. (CO2 - Carbon dioxide emission)
Chassis
Frame TypeSteel doble cradle
Rake
Trail
Front SuspensionLeading link
Front Travel
Rear SuspensionRigid
Rear Travel
SeatSingle seat
Seat Height
Alt. Seat Height
Total Height950 mm (37.4 inches)
Total Length2,100 mm (82.7 inches)
Total Width800 mm (31.5 inches)
Ground Clearance
Wheelbase1,410 mm (55.5 inches)
Dry Weight
Wet Weight126.0 kg (277.8 pounds)
Wheels & Brakes
Front Tire/Tyre3.5-26
Rear Tire/Tyre3.5-26
Front BrakesExpanding brake (drum brake)
Front Brake Diameter150 mm (5.9 inches)
Rear Brakes
Rear Brake Diameter
Wheels
Comments