1948 Nimbus 750cc Model C Frame no. 6226 Engine no. 3901

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Lot 81
1948 Nimbus 750cc Model C
Frame no. 6226 Engine no. 3901

US$ 15,000 - 20,000
£ 11,000 - 15,000
1948 Nimbus 750cc Model C
Frame no. 6226
Engine no. 3901
• Believed less than 200 Nimbus models exported to America
• Restored by previous owner

The result of diversification by the Danish vacuum cleaner manufacturer, Fisker & Nielsen, the Nimbus motorcycle, the A-model first appeared in 1919. Unusually, only inline four-cylinder models were built. To be precise it was an air-cooled 746cc in-line four-cylinder power unit with 22, eventually more, horsepower. These engines were of advanced design, using shaft final drive and pressed steel frames right from the start of production, and pioneered the use of the telescopic front fork in the mid-1930s. The early models featured a distinctive tubular spine frame that doubled as the fuel tank, soon gaining the nickname 'stovepipe'. The low-compression Nimbus engine was noted for its smoothness and flexibility.

In 1928, motorcycle production was suspended to enable the company to concentrate on producing its Nilfisk vacuum cleaners, and when the new C-model Nimbus appeared in 1934 it was with an overhead cam power unit that showed strong motor-industry influence, being constructed along car lines with integral crankcase/cylinder block in cast iron and a detachable alloy sump. The cast-iron one-piece cylinder head was topped by an alloy housing for the single overhead camshaft, which was driven by shaft-and-bevel gears. A single-plate clutch transmitted power to the three-speed gearbox. The original 'stovepipe' frame had been superseded by one made from flat spring steel, while foot change for the gearbox, a beefier front fork, and larger brakes had been added by the end of the 1930s. Nimbus was ahead of its time in many ways, introducing its first telescopic front fork in 1934 and adopting closed-circuit crankcase ventilation many years before the automobile industry.
From then onwards the Nimbus changed little until series production was ended in 1954, once again to free up resources for the vacuum cleaner business. An additional few machines were assembled from spares between 1954 and 1959 but none have been made since then.
Production was always on a limited scale, even though they were popular with the Danish military and post office through 1972, but such is the build and materials quality of the Nimbus that many remain in service today. It is thought that less than 200 Nimbus motorcycles have been imported to the USA.

This C-series was restored in Germany having been with the same owner for the last 20 years. It was started and run in December 2018 and the vendor advises easy to start and a brisk runner – all that one might expect. Its overall condition is that of a well-executed and maintained restoration, its 20-year patina proudly wearing well.

Footnotes

  • As with all Lots in the Sale, this Lot is sold 'as is/where is' and Bidders must satisfy themselves as to the provenance, condition, age, completeness and originality prior to bidding.
Contacts
1948 Nimbus 750cc Model C Frame no. 6226 Engine no. 3901
1948 Nimbus 750cc Model C Frame no. 6226 Engine no. 3901
1948 Nimbus 750cc Model C Frame no. 6226 Engine no. 3901
1948 Nimbus 750cc Model C Frame no. 6226 Engine no. 3901
1948 Nimbus 750cc Model C Frame no. 6226 Engine no. 3901
1948 Nimbus 750cc Model C Frame no. 6226 Engine no. 3901
1948 Nimbus 750cc Model C Frame no. 6226 Engine no. 3901
1948 Nimbus 750cc Model C Frame no. 6226 Engine no. 3901
1948 Nimbus 750cc Model C Frame no. 6226 Engine no. 3901
1948 Nimbus 750cc Model C Frame no. 6226 Engine no. 3901
1948 Nimbus 750cc Model C Frame no. 6226 Engine no. 3901
1948 Nimbus 750cc Model C Frame no. 6226 Engine no. 3901
1948 Nimbus 750cc Model C Frame no. 6226 Engine no. 3901
1948 Nimbus 750cc Model C Frame no. 6226 Engine no. 3901
1948 Nimbus 750cc Model C Frame no. 6226 Engine no. 3901
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