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 348cc and 496cc sizes with one overhead valve opened by a chain-driven ohc and rocker, and a rotary valve.
As rotary valves were noted for being unreliable, the public did not take to the machine and it soon slipped from sight.
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