1927 BMW 494cc R42 Frame no. 12564 Engine no. 42620

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Lot 202
1927 BMW 494cc R42
Frame no. 12564 Engine no. 42620

CHF 36,000 - 48,000
US$ 40,000 - 53,000
Amended
1927 BMW 494cc R42
Frame no. 12564
Engine no. 42620
•One of 6,502 made
•Not run since restoration
•Requires re-commissioning

Footnotes

  • Following the collapse of its aero engine business after WWI, BMW turned to other areas of manufacture, motorcycles among them. Its first two models, marketed as the Frink and Helios respectively, were failures but a successful proprietary engine was supplied to other manufacturers. Launched in 1923, the first motorcycle to be sold as a BMW - the R32 - featured a 494cc, twin-cylinder, sidevalve engine having horizontally opposed cylinders, and this 'flat twin' layout would forever be associated with the marque. Setting a pattern that endures to this day, the first BMW motorcycle was relatively expensive but superbly engineered and constructed, while the quality of finish was of the highest order. Before long BMW updated its original tourer, which in 1926 became the R42, gaining a redesigned and more powerful engine boasting detachable alloy cylinder heads and cooling fins set at 90 degrees to the cylinder axis. The engine was set further back in the duplex loop frame, which improved weight distribution and enabled straight front down-tubes to be used. The braking too came in for attention: the old block-and-pulley type rear brake being replaced by a drum on the driveshaft gripped by external contracting bands. Electric lighting was still regarded as an 'extra' and would not be standardised until 1928. R42 production lasted for just two years and today this rare BMW is among the marque's most desirable and sought after machines of the Vintage period.

    Dating from 1927, only four years since BMW had commenced motorcycle production, this rare R27 has been carefully restored and is presented in commensurately good condition. Unfortunately, the speedometer was stolen while the machine was on display at an exhibition. The machine has not been run since the restoration and will require careful re-commissioning before use. Accompanying documentation consists of original German registration papers and Swiss form 13/20.

    BMW R42 494 cm3 1927
    Cadre n° 12564

    •6502 exemplaires produits
    •Non utilisée après restauration
    •Révision conseillée

    A la suite de l'arrêt forcé des fabrications aéronautiques après la Grande Guerre, BMW dut envisager d'autres types de production dont les motocyclettes. Ses deux premiers modèles, commercialisés sous les noms de Frink et Helios respectivement, furent des échecs, mais l'excellent moteur maison fut livré à d'autres constructeurs. Lancée en 1923, la première moto vendue sous la marque BMW – la R32 – était dotée d'un moteur de 494 cm3 à soupapes latérales et deux cylindres à plat opposés dont l'architecture « flat twin » allait être désormais associée à la marque.

    Établissant un modèle qui perdure de nos jours, la première moto BMW était relativement coûteuse, mais excellente du point de vue de la conception technique et de la fabrication, tandis que le niveau des finitions était exemplaire. Très vite, BMW modernisa sa première routière qui, en 1926, devint la R42 en recevant un moteur révisé et plus puissant doté de culasses détachables en aluminium et d'ailettes de refroidissement disposées à 90 degrés de l'axe des cylindres. Le moteur reculé dans le cadre duplex améliora l'équilibre des masses et permit d'utiliser des tubes avant rectilignes. Le freinage fut aussi revu : l'ancien système arrière à poulie fit place à un tambour sur l'arbre de transmission serré par des colliers externes.
    L'éclairage électrique encore considéré comme trop luxueux ne sera standard qu'en 1928 ; la production de la R42 ne dura que deux ans et, de nos jours, cette rare BMW de la période Vintage fait partie des machines de la marque les plus recherchées de cette époque.

    Datant de 1927, quatre ans seulement après les débuts de la marque comme constructeur, cette R27 soigneusement restaurée se présente dans un état remarquablement bon. Malheureusement, le compteur de vitesse a été dérobé lors d'une exposition. La machine qui n'a pas été utilisée depuis sa restauration requiert une remise en marche précautionneuse. La documentation comprend ses papiers d'immatriculation allemands d'origine et le document suisse 13/20.

Saleroom notices

  • Please note there are no German registration papers with this machine. Veuillez noter qu'il n'y a pas de papiers d'immatriculation allemands avec cette machine.
Contacts
1927 BMW 494cc R42 Frame no. 12564 Engine no. 42620
1927 BMW 494cc R42 Frame no. 12564 Engine no. 42620
1927 BMW 494cc R42 Frame no. 12564 Engine no. 42620
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