Bert Le Vack was employed at the JAP engine factory, and was a record-breaking rider and tuner of machines manufactured by others. In 1923 his name appeared on the sole model of a sporting motorcycle. It had a 344cc ohv JAP engine, three-speed Burman gearbox and all-chain drive.
It was only available for that year. Prior to this he worked with Duzmo.
Le Vack was an enigmatic character who achieved great things. As a rider he took numerous world speed records in France and England, and rode for many manufacturers including Indian, New Imperial, Zenith and Brough Superior, where he worked on T.E. Lawrence's machines.