1970 Norton 750cc Commando Roadster Frame no. 20M3S138639

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Lot 55
1970 Norton 750cc Commando Roadster
Frame no. 20M3S138639

Sold for US$ 6,440 inc. premium
1970 Norton 750cc Commando Roadster
Frame no. 20M3S138639
As the 1960s wound down, Norton had a problem. To battle rivals BSA and Triumph, the company's parallel twin had been taken to 750cc, and while the resulting Atlas model retained superior handling thanks to its Featherbed frame, now engine vibration was a problem for riders. The solution was ingenious and would make the Commando 750 and later 850 two of the most useable, rider-friendly Britbikes of the era. For 1968 a new frame held the engine/gearbox/swingarm unit in a rubber-mounted cradle, a remarkably efficient 'Isolastic' anti-vibration system that effectively isolated the motor's oscillations from the rider as soon as revs passed 2,500 rpm. The new Commando became an instant hit with the motorcycling public, being voted Motor Cycle News' 'Machine of the Year' five consecutive times in the UK.

Besides the new frame, the rest of the running gear was pretty familiar – forks, hubs, brakes and transmission were as fitted to earlier Nortons, long proven in service. The engine's forward-inclined cylinders added some flair, as did the sharply angled rear shocks and distinctive cast alloy footpeg carriers.

This 1970 Commando Roadster is an all-original machine with the exception of its shouldered Akront alloy rims, no doubt a period modification few will complain about. The current owner has gone through the bike thoroughly, renewing cables, rubber parts and seals. The engine's top-end was taken down for a re-ringing, new springs and a valve job. While the bodywork's silver metalflake paint is original to the bike, the fiberglass fuel tank's interior has been treated with a sealant for use with today's ethanol-laced gasoline.

Saleroom notices

  • Please note that the frame and engine numbers for this bike are 138639 and 20M3S138639 respectively, and it is titled under its engine number.
Contacts
1970 Norton 750cc Commando Roadster Frame no. 20M3S138639
1970 Norton 750cc Commando Roadster Frame no. 20M3S138639
1970 Norton 750cc Commando Roadster Frame no. 20M3S138639
1970 Norton 750cc Commando Roadster Frame no. 20M3S138639
1970 Norton 750cc Commando Roadster Frame no. 20M3S138639
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