1914 "Calthorpe" 4 ¼ h.p. Model (with sidecar)

1914 4hp single

Appearance As picture

Click here for left-hand view



Engine - 4 ¼ h.p. single cylinder Precision, 90 mm. bore x 96 mm. stroke having a capacity of 600 c.c., mechanically operated valves.

Carburetter - Improved 1914 senspray.

Ignition - Bosch high tension magneto, chain driven, in water and dust-proof case. Handle bar control.

Tank - Petrol capacity 1 ¼ gallons and 1 quart oil, Best and Loyd sight-feed lubrication, combined patent petrol gauge and strainer, screw filler caps.

Transmission - Calthorpe two-speed counter-shaft gear and free engine. Chain and belt drive, kick-pedal starting.

Frame - Heavy gauge weldless steel tubing, reinforced with spirally-lined patent tube, brazed on Calthorpe patent quick detachable side-car joints, Druid spring forks.

Brakes - Rear acting on belt rim operated by foot pedal, Bowden front brake operated buy inverted lever with patent magneto cut-out before brake shoes come into contact with rim.

Wheels - 26 x 2 ¼, Michelin tyres heavily plated steel rims with black centers and red lines, oil-retaining dust-proof hubs.

Standard Fittings - Front and rear stands, tubular carrier with pannier tool bags, side-splash mudguards on front, pan seat. 

Finished with patent anti-rust treatment, enamelled in four coats of lustre enamel, and lined green and gold. The tank aluminium, lined and panelled to match.



Armstrong three-speed hub.

Art-cane Body built Side-car.


Additional Information - (Available to members in downloads section)

  • 1914 Sales Brochure and parts list.
  • Advertisements as published in 1914.
  • The Motor Cycle. Nov. 20th 1913 - 1914 Precision Engine article.


  • 1914 Sales Brochure