1936 500cc Ivory


Appearance As picture (see 350cc model for right-hand side view

Click here for rear/top view



Engine - Two-port OHV design, 85.5mm bore x 86mm stroke having a capacity of 493 c.c. Aluminium piston.

Carburettor - Amal T.T type with down draught and straight induction, twist grip control and separate air levers on Amal 'clean bar' type handlebar.

Magneto - Spigot mounted and chain driven.

Petrol Tank - 2 3/4 gallons capacity. Enamelled and lined. Inserted rectangular instrument panel.

Front Forks - Girder type of Druid manufacture.

Transmission - Chain to primary drive, enclosed in an oilbath gearcase with oil feed to primary and dynamo chains.

Gearbox - Burman four-speed, enclosed foot change or hand change option.

Wheels - 7inch internally expanding brakes.

Tyres - 26in. x 3.25in. Goodyear.

Electrics - Miller 6v coil ignition or separate dynamo and magneto as required. 8 inch Miller headlight.

Front and rear stands, Terry heavyweight saddle.


Finished in Calthorpe Ivory or ebony black at option, and lined to suit the colour.



Trip or Non-Trip Speedometer built into front wheel and mounted on front forks.

Chromium-plated tank.

Specially tuned Racing Engine with optional Upswept Exhaust Pipes at request.



First year of having valve guides/springs and rockers totally enclosed and lubricated by oil directly from engine.

Red versions appear.


Additional Information  - (Available to members in Members Area)

  • Road Test for 500cc model as published in Motor Cycling magazine (Dec 11th, 1935). 
  • Complete 1936 sales brochure.
  • Photos of surviving bikes.
  • Estimate production and known surviving machine figures.



  •  1936 Ivory Calthorpe sales brochure.