These were off-road machines built by Nauder, the French importer of Sachs, from c.1981 to 1986.
The logo looks like "VSN", but is actually a stylised triangle followed by "SN". Models included SN 250GS 1981, Sachs Nauder 125 MX 1982 and SN 250 GSB 1986. They had dual rear shocks similar to Fournales. Late models had Grimeca disc brakes.
Sachs-Nauder 250 GSB 1982 Enduro
Engine:
Sachs air-cooled 2-stroke single. Bore x Stroke 70.5 x 61 mm., 238 cc. Power: 38 hp @ 8000 rpm. Carburettor: Bing 36 mm. 7-speed gearbox. Cable-actuated clutch. Kickstarter.
Chassis
Frame: dual-cradle. Fork: air-filled telescopic fork - travel 250 mm. Rear suspension: hydro-cross Rear travel 300mm Brakes: front 140 mm drum. Rear HVA drum. Weight 100 kg (dry). Fuel capacity: 9 litres.
Sachs-Nauder 250 GSB 1986 Enduro
Engine:
Sachs air-cooled 2-stroke single. Bore x Stroke 70.5 x 61 mm., 238 cc. Power: 28.7 kW (39 hp) at 8500 rpm. Carburettor: Bing 38 mm. 7-speed gearbox. Cable-actuated clutch. Kickstarter.
Chassis
Frame: steel. Fork: Marzocchi 40 mm. - travel 300 mm. Rear suspension: Sachs Hydro Cross Rear travel 300 mm. Brakes: front Grimeca disc. Rear Grimeca conical. Weight 97 kg. Fuel capacity: 9 litres.
Sachs-Nauder 125 GSB 1986 Enduro
Engine:
Sachs, air-cooled. Bore x Stroke 53.75/54 123cc Power: 28 hp at 11,000 rpm. Carburettor: Bing 32 mm. 7-speed gearbox. Cable-actuated clutch. Kickstarter.
Chassis
Frame: Nauder. Fork: Marzocchi 40mm diameter - travel 300mm. Rear suspension: Sachs HydroCross - travel 300mm. Brakes: front Grimeca disc. Rear Grimeca conical. Weight 94kg. Fuel capacity: 9 litres.
Sources: forum posts, period advertising, Le Guide Vert
