1938 Norton 490cc Model 18 to Trials specification
Registration no. OSL 171
Frame no. 84986
Introduced for 1923, the Model 18 was Norton's first overhead-valve production model and retained its essentially Vintage characteristics until extensively redesigned in 1931. At this time Norton's singles adopted the rear-mounted magneto - already seen on the ES2 - and switched to dry-sump lubrication. Norton continued to fit Sturmey-Archer gearboxes and all models - the ES2 excepted - used an open diamond frame. Changes between '31 and 1939 included an additional drive-side main bearing, revised cam gears, the adoption of Norton's own gearbox, and - in 1938 - a new cylinder head with enclosed valve gear. This Model 18 competition model dates from 1938, though the un-numbered engine is of the open-valve gear/parallel pushrod type in use prior to that year, and the front forks are slightly longer than standard. Previously forming part of the celebrated Autokraft Collection, the machine was sold by Brooks Auctioneers at its RAF Museum, Hendon sale in March 1999 when the Collection was dispersed (Lot 97). The current vendor acquired the Norton in January 2011 and since then has participated with it at several Brooklands hill climbs and the 2012 Graham Walker Run (competitor number '101'). Described as in generally good condition, the machine is offered with VMCC dating letter, current road fund licence, expired MoT (2011) and V5C registration document.