1922 3 h.p. "Calthorpe Two-Stroke" Two-Speed

1922 2stroke 2speed

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Engine - 3 h.p. PECO, 75 mm. bore x 79 mm. stroke having a capacity of 350 c.c. Two stroke of the three port type. Hoffman roller main bearings and crank pin.

Carburetter - Amac.

Ignition - High-tension variable Magneto, handle bar control.

Tank - 1 ¼ gallons petrol, 1 quart oil.

Lubrication - "Patent and perfect system" (No oil mixed with petrol), through a sight drip feed Lubricator.

Transmission - Enfield Patent Two-Speed gear and Free-Engine with cush sprocket. Roller chains from engine sprocket to gear. ¾in. Dunlop belt from fixed pulley off gear to rear belt rim.

Frame - Weldless steel tubing, all vital parts reinforced, Patent Girder forks.

Brakes - Rear acting on belt rim, operated from foot pedal and powerful Bowden front brake.

Wheels - 26in. x 2in. Dunlop Beaded Edge Studded Tyres, heavily plated steel rims with coloured centres, oil retaining dust and weather proof hubs.

Standard Fittings - Patent Pan seat, rear stand, carrier, strong wide mudguards, armoured Pannier Bags with tools.

Finished in four coats of lustre enamel and all bright parts heavily plated, tank enamelled Black and Gold leaf lined.



Kick Starter.


Additional Information - (Available to members in downloads section)

  • 1922 Sales Brochures, Enfield gear information and spare parts list.
  • The Motor Cycle 4th May, 1922 - Road Test of 2 ½ h.p. Single-Speed model.
  • Calthorpe Letter, Dated, Dec. 6th 1922.


  • 1922 Sales Brochure.