MECHANICAL SPECIFICATIONS: Single-cylinder, two-stroke engine. Displacement: 250 cc (67 x 70 mm). Transmission: chain-driven. Gearbox: three-speed. Frame: single cradle tubular steel. Front suspension: parallelogram fork. Rear suspension: rigid.

HISTORY: Founded in 1917 in the town of Mâcon, Monet Goyon became the second-largest French motorcycle manufacturer by the 1930s, remaining among the country’s top four in terms of production, technical innovation, and sporting achievements until it ceased operations in 1959. The O25 model was introduced in 1933 and remained in the catalogue for four years, offered in various versions, all equipped with the Villiers Mark XI A engine, producing 4.8 hp at 4,000 rpm and fed by a Gurtner side-float carburettor. The electrical system is 6V, featuring an alternator driven by the magnetic flywheel pulley. The parallelogram front fork uses a central Webb-type spring, while the rear employs the classic rigid frame. Braking is by 170 mm drum brakes on both wheels. With a weight of 85 kg, it reaches a top speed of 85 km/h.

The example offered is a 1934 Tourisme version. It was restored some years ago and remains in very good condition. With a simple tune-up, it could return to running order without major difficulty. It is an excellent example of a French classic from the interwar period, the era most prized by knowledgeable enthusiasts.