These are the known mechanical and performance specifications for your 1897 Clarke Gasoline Tricycle.
Basic Specs

Engine
Displacement138.00 ccm (8.42 cubic inches)
TypeMechanically operated exhaust valve and an automatic intake valve
DetailsSingle cylinder, four-stroke
Max RPM
Compression
Bore/Stroke
Valves/Cylinder
Fueling
Ignition
ExhaustSmall muffler
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
Wheels26 x 2 1/2-inch single-tube pneumatic tires
Comments
US made motorbike. With pedals in addition to engine.