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FLM were the initials of Frank Leach Manufacturing of Leeds, who produced motorcycles from 1951 to 1953.
Frank Leach was formerly with P and M
The machine was a lightweight powered by a 125cc JAP two-stroke engine. It had an unusual frame that was built from channel-section steel, a pivoted rear fork suspended by springs fitted under the engine, and telsecopic forks.
Although there was talk of further models, none appeared and FLM left the market when supplies of the JAP engine stopped.