1933 500cc Ivory

1933 500cc

Appearance As picture

 

Specification 

Engine - Two-port OHV design, 85.5mm bore x 86mm stroke having a capacity of 490 c.c. Aluminium piston.

Carburettor - Amac T.T type with twist grip control to magneto and throttle and separate air levers on Amal 'clean bar' type handlebar.

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 - Special Calthorpe four-speed (Albion) with hand change.

Wheels - 7 inch internally expanding brakes.

Tyres - 26in. x 3.25in. heavy 4-ply cord studded.

Electrics - Fitted standard with magneto or coil ignition or separate dynamo and magneto as required. 

Front and rear stands, Terry heavyweight saddle.

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

 

Extras 

Trip or non-trip Smiths speedometer with internal front wheel drive.

S.U.S lighting set and horn.

Foot change gearbox.

Chromium plated tank panels.

Competition upswept exhaust pipes.

 

Notes

Back to one model production after a brief period manufacturing 3 different models (The Junior, The Minor & The Major) in 1932.

 

Additional Information  - (Available to members in downloads section) 

  • 1933 sales brochures (2 different publications available)
  • Estimate production and known surviving machine figures.

 

Sources

  •  1933 Ivory Calthorpe sales brochure.