The production of the S51 was started in 1980. The most noticeable changes were the use of a completely redesigned, compact engine with a wide range of technical innovations and great variability. With this state-of-the-art 3-horsepower engine with 3- or 4-speed gearbox, A 10% reduction in fuel consumption is achieved, and the noise and exhaust emission limit values
according to ECE are still undercut. Further essential details were a plate spring clutch as well as a completely new kickstarter device.
|engine specs||Type:||Single Cylinder, 2 Stroke||Displacement:||50 cm3||Bore X Stroke:||-||Compression Ratio:||-||Horsepower:||3.75/5500 KW(hp)/RPM||Torque:||4/4800 lb-ft/RPM OR 5/4800 Nm/RPM||Fuel System:||Carburetor|
|transmission specs||Gearbox:||3-Speed||Clutch:||-||Primary Drive:||-||Final Drive:||Chain|
|chassis specs||Frame:||-||Front Suspension:||Telescopic forks||Rear Suspension:||Roller with spring legs||Front Brake:||Drum||Rear Brake:||Drum|
|dimension specs||Overall Length:||74.4 in OR 1890 mm||Overall Width:||34.6 in OR 879 mm||Seat Height:||-||Weelbase:||47.6 in OR 1209 mm||Ground Clearance:||-||Weight:||185 lbs OR 84 kg||Fuel Capacity:||2.3 gallons OR 8.7 L|
|power system specs||Power pack:||-||Nominal Capacity:||-||Maximum Capacity:||-||Charger type:||-||Charging time (normal):||-||Charging time (quick):||-||Range:||-|