1923 Norton 490cc 16H

Having hitherto relied on proprietary engines, Norton introduced its own power unit in 1907. The long-stroke sidevalve single displaced 633cc and the new model it powered became known as the 'Big 4'. Smaller capacity versions followed, and in 1911 the '500' adopted the classic 79x100mm bore and stroke dimensions that would characterise the half-litre (actually 490cc) Norton for the next 50 years.

Norton's new sidevalve was among the fastest in its class, being the first machine under 500cc to be officially timed at over 70mph, which was some going for 1911. The 490cc engine was revised for 1914 and the following year gained a new frame with lowered riding position together with the option of a Sturmey-Archer three-speed gearbox. In 1915, riding the '490' Norton, D R O'Donovan took the world kilometre record for 500cc machines at a speed of 82.85mph; small wonder that the slogan 'Unapproachable' began to be applied to the Norton singles at around this time.

When fitted with chain drive, the 490cc sidevalve single became the 'Model 16' in Norton's numbering system, changing to '16H' in 1921 when a new lower frame was introduced. Norton's trusty 16H sidevalve would be continuously updated for the next 30-plus years before taking its final bow, alongside the Big 4, in 1954.

'NR 2090' is a 3½hp sports model with all-chain drive and a clutch, and was supplied new by H Petty & Sons of Leicester to Mr Cecil St. Leger Jervis of Hoton, Leicestershire and first registered on 9th March 1923 (see communication on file from Leicestershire County Council). The frame '6418' and engine '5347' are original, as confirmed by information supplied by the Metropolitan Police and Norton Owners' Club (see file).

In 1960, Arthur Tyler, a successful Isle of Man TT racer in the 1930s, discovered the Norton in a shed. Its identity was later confirmed by none other than VMCC founder, C E 'Titch' Allen, who recalled cleaning it before the war. Arthur passed the Norton on to his son, Stuart Tyler, who commissioned renowned restorer Robin James to carry out a full rebuild. The bulk of the restoration was undertaken between 1987 and 1991, with further works in the 2000s. The Norton participated in the Banbury Run on a few occasions and then in 2011 was purchased by the current owner, who has continued the Banbury Run entries and participation in other Vintage motorcycle events. Our private vendor advises us that the Norton could cover 100 miles in a day and typically covers 300 miles per annum. According to the vendor: "It is a quick machine, pulling firmly up to 55mph, at which point the rider is reminded of the basic suspension, beaded-edge tyres and limited (but functional) brakes and will moderate any further acceleration."

Prospective purchasers should satisfy themselves with regard to this motorcycle's history, completeness, authenticity, originality, and mechanical condition prior to bidding.

In addition to that mentioned above, accompanying paperwork includes Stuart Tyler's account of the Norton's discovery and restoration; a series of Robin James's progress reports; a quantity of (copy) marque-related and technical literature; a selection of restoration photographs; and a current V5C Registration Certificate.
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