Engine: two-stroke; bore 65mm, stroke 75mm; volume 250ccm; power 3 CV; 2 sp; crankshaft mounted on 2 plain bearings
Lubrication: petrol and oil mixture
Carburettor: automatic with two levers: petrol and air regulation
Transmission: Campbell system, 3 speeds
Coupling: gradual, multi-disc cork plates, externally adjustable
Gears: 1 ° primary chain from engine to gearbox with aluminum cover; 2 ° secondary chain from gearbox to rear wheel.
Frame: tubular looped
Fork: reinforced, parallelogram type with adjustable steering damper. Pressure lubrication by Técalémit pump.
Wheels: 19" with drum brakes, front dia. 130mm, rear 170mm removable. Balloon tyres 70 x 100 Dunlop
Tank: for approx. 8.5 litres of mixture
Oil tank: 2 litres
Exhausts: two long nickel-plated pipes with high-capacity aluminum silencers
Knee pads: rubber, affixed to tank
Tool box: mounted above the tank with a lockable lid.
Tyre Pump: 40x24 mounted on the front fork
Note: Some sources give the date of the Grand Sport as 1927.