This 1917 newsreel clip, IWM IWM 130-07-+8, shows a motor machine gun section move out of its camp, "in its cycle combinations"
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Video
This Day In WWI
Jun 12 1918 #OTD War photographer David McLellan takes these photos of inspection, by General Henry Horne, of 24th Motor Machine Gun Battalion. Bikes are Clyno 744 cc twin-cylinder motorcycles with sidecar and Vickers Machine Gun
IWM Q 10323, IWM Q 10328, IWM Q 10326