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Bicycle Kits are sold complete with all necessary equipment, "ready to ride". Billet engine mounts are located on the frame. All wiring is included and installed. The spark plug wire, engine kill, and throttle are tied to the frame for easy attachment when the motor is installed.

Engine Kits are sold separately. Installation into the Ridley's bicycle kit requires some mechanical ability, but can be installed and running in less than one hour.



The Model 48 Engine is a 49cc, 2 stroke single cyclinder engine. The simple but efficient engines consistantly offer 120 miles per gallon but are even more efficient when you combine pedal with petrol power.

Ridley's aircraft aluminum engine mounts offer durability and comfort by isolating engine vibration through a rubber dampening system.

The engines are setup for installation into any of Ridley's Vintage Motorbikes. The Model 48 engine is capable of speeds around 24 mph


49cc Single Cylinder

Two Stroke

EPA Compliant

Top Speed varies by rear sprocket size:

44 Tooth (Standard) : 24 MPH
40 Tooth (Aftermarket) : 30 MPH



Engine Kit $625
Engine Kit includes vintage exhaust, engine, clutch, extended primary drive sprocket, final drive chain, noise deadening material, pre-wired engine kill with quick disconnect plug. Requires installation estimated at 1 hour.

      The Model 48 Engine is currently available.  
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