These are the known mechanical and performance specifications for your 1912 Royal Enfield Prototype.
Basic Specs

Engine
Displacement344cc
Type
DetailsEnfield 344cc
Max RPM
Compression
Bore/Stroke
Valves/Cylinder
Fueling
Ignition
Exhaust
Lubrication
Cooling
Chassis
Frame Type
Rake
Trail
Front Suspension
Front Travel
Rear Suspension
Rear Travel
Seat
Seat Height
Alt. Seat Height
Total Height
Total Length
Total Width
Ground Clearance
Wheelbase
Dry Weight
Wet Weight
Wheels & Brakes
Front Tire/Tyre
Rear Tire/Tyre
Front Brakes
Front Brake Diameter
Rear Brakes
Rear Brake Diameter
Wheels
Comments
Pre-war Production: Enfield's first home produced V engine. 2 3/4hp Overhead inlet/side ex valve