Photo ou archives : F-M. Dumas
7617
BRONDOIT
250 Sport ·1922
Easy to maintain
The first two-wheelers built by Nicolas Brondoit appeared in 1919, in the post-WWI
boom, although this was not Brondoit's first experience of engine manufacture.
Power Unit Pioneer
As early as 1895, the Bayard-Brondoit consortium built four-stroke engines that were intended to be fitted to bicycles and equipped with rudimentary surface carburetors in which the inflammable mixture was liberated by heating the gasoline in the carburetor with a bypass from the exhaust pipe! Around 1902, partnered by one Pocher, Nicolas Brondoit built industrial stationary engines, but WWI brought this venture to an end in 1914.
Simplicity the Object
After WWI, the first motorcycles built by Brondoit had 97cc two-stroke engines that
were mounted in bicycle frames and fitted with clutches but not gearboxes -they were
sold under the name "Ideal-SF." The capacity was soon increased to 130cc, and the first
motorcycle to bear the Brondoit name soon followed in 1922. Its manufacturer wanted to make it simple in the extreme to ensure the greatest ease of maintenance for his clients. This simplicity didn't prevent the Brondoit from proving extremely rapid - it could easily reach 50 mph. From there, it was only a short step to actual competition, and Lempereur, after an initial victory in the 250cc class of the 24 Hours of Vise, also won the 250cc trophy in the 1925 Bol d'Or.
SPECIFICATIONS
Engine: 247cc (67x70mm) air-cooled single cylinder; two extemal inertia flywheels; high-tension magneto driven from the end of the crankshaft
Valves: two-stroke
Fuel System: carburetor
Transmission: direct V-belt drive
Suspension: pivoting forks (front); rigid (rear)
Brakes: belt rim (rear)
Wheels: 26 inch clincher (front & rear)
Maximum Speed: 50 mph
This Brondoit bas an ingenious design – the muffler incorporated an exhaust cut-out for the sporty rider.