Norton-Villiers was a British motorcycle manufacturer formed in the 1960s following the collapse of Associated Motorcycles. With the general decline of the British motorcycle industry it was combined with the remnants of BSA to form Norton-Villiers-Triumph.
Norton Villiers (1966–1973)
In 1966 Associated Motorcycles AMC went bankrupt and were taken over by Manganese Bronze Holdings who formed Norton-Villiers to oversee operations. At the time Norton was the only motorcycle marque in the company that was making money. The AJS and Matchless traditional single cylinder four-stroke models were finished. Matchless and AJS badged models, with Norton motors, were assembled till 1969. In 1968 all models had new carburettors, ignition systems and an ignition lock. The G15CS/N15CS/M33CS had improved cycle parts for 1968–69.
The P11 series was a completely new development for 1967 and was further developed for 1968–69. The P11 was available either as Norton or Matchless.
- Main article: Norton Commando
For Norton-Villiers the development of a new engine was cost prohibitive, but the vibration of the 750 cc vertical twin was so well transmitted to the rider through the Featherbed frame of the Norton Atlas, that it was dropped in favour of an earlier experimental frame that would separate the rider from the engine with rubber bushings. The Norton Isolastic frame was developed in time for the 1967 Earls Court Show.
Production began in April 1968, but bending problems with the frame resulted in a more developed frame being introduced in January 1969.
The Norton Commando promptly turned up in racing events.
The 1969 Commando S was introduced with a high-level left-side exhaust and a 2.5-imperial-gallon (11 L; 3 US gal) petrol tank. The original model was thereafter referred to as the Commando Fastback.
In late 1968 the Plumstead works at Burrage Grove, where engines from the Wolverhampton plant and frames from the Manchester plant were assembled into complete machines, were presented with a Greater London Council compulsory purchase order.[why?] The Plumstead works closed in July 1969.
A Government subsidy allowed assembly to move to a factory at North Way, Andover, with an aircraft hangar on nearby Thruxton Airfield housing the Test Department. Manufacturing was concentrated at Wolverhampton, with 80 complete machines produced there each week. Wolverhampton also shipped components, assembled engines, and gearboxes to the Andover assembly line.
NV Motorcycle models
- Neale Shilton designed a Commando to police specifications, the Norton Commando Interpol. It had panniers, top box, fairing, and fittings for auxiliary electrical equipment
- March 1970, Roadster
- June 1970, Commando S discontinued
- September 1970, Fastback MK. 2, soon replaced by the Fastback Mk.3
- May 1971, Street Scrambler and the Hi Rider
- July 1971 Fastback Long Range
- January 1972 Mk.4 Fastback, an updated Roadster, and the 750 Interstate, with Combat engines.
The high performance Combat engine gave 65 bhp (48 kW) at 6,500 rpm using 10 :1 compression. It was too much for the stretched old 500 cc design, with main bearing failures and broken pistons being reported in the press, along with quality control issues.
The solution to the main bearing problems was the much fabled "Superblend' bearings, although these were in reality just a higher load capacity roller bearing. And the piston issues were resolved by removing the slot for oil drainage behind the oil ring, and drilling a series of holes instead, so that the piston crown didn't separate from the piston at higher rpms.
This brought a deterioration in finances. By the middle of 1972 the BSA group was in serious financial trouble as a result of its BSA and Triumph motorcycle activities. The government offered a financial rescue package contingent on a merger of the two groups and Norton-Villiers-Triumph was born.
Motorcycle History (retrieved 21 October 2006)
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