These are the known mechanical and performance specifications for your 1950 Harley-Davidson EL.
Basic Specs

Engine
Displacement999.67 ccm (61.00 cubic inches)
TypeKnucklehead V-twin engine. Hydraulic valve lifters.
DetailsV2, four-stroke
Max RPM
Compression7.0:1
Bore/Stroke88.9 x 83.8 mm (3.5 x 3.3 inches)
Valves/Cylinder
FuelingCarburettor
Ignition
Exhaust
LubricationCiculation pressure system
CoolingAir
Fuel Economy & Polution
Fuel Consumption
Fuel Capacity14.19 litres (3.75 gallons)
Emissions
Chassis
Frame TypeSteel double loop
Rake
Trail
Front SuspensionSpring forks
Front Travel
Rear SuspensionHardtail
Rear Travel
Seat
Seat Height
Alt. Seat Height
Total Height
Total Length
Total Width
Ground Clearance
Wheelbase1,511 mm (59.5 inches)
Dry Weight250.0 kg (551.2 pounds)
Wet Weight
Wheels & Brakes
Front Tire/Tyre5.00-16
Rear Tire/Tyre5.00-16
Front BrakesExpanding brake (drum brake)
Front Brake Diameter
Rear BrakesExpanding brake (drum brake)
Rear Brake Diameter
WheelsWire spoked. Firestome or Goodyear tyres.
Comments
Optional 4-speed transmission.