Grace's Guide To British Industrial History

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Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 167,737 pages of information and 247,134 images on early companies, their products and the people who designed and built them.

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 147,919 pages of information and 233,587 images on early companies, their products and the people who designed and built them.

GRI

From Graces Guide
Revision as of 14:59, 27 August 2007 by Anita (talk | contribs)

GRI were motorcycles produced from 1920 to 1922. Distributed by Macrae and Dick of Inverness, the engine was designed by G. R. Inshaw.

The machine was first promoted in 1920 and was produced in 350cc and 500cc sizes with one overhead valve opened by a chain-driven ohc and rocker, and a rotary valve.

The engine was fitted into a conventional frame with Brampton forks. It had a two-speed Sturmey-Archer gearbox with belt final-drive.

As rotary valves were noted for being unreliable, the public did not take to the machine and it soon slipped from sight.


Sources of Information

The British Motorcycle Directory - Over 1,100 Marques from 1888 - by Roy Bacon and Ken Hallworth. Pub: The Crowood Press 2004 ISBN 1 86126 674 X

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