NSU Superfox (Type 125 OSB)
Production: 1955-1957
Units built: 1955:4130
1956:9992 1957:1408
Engine: 1 cylinder 4-stroke,
dry sump with external oil tank
HP: 8.8 at 6500 rpm
Engine displacement: 123cc
Cylinder diameter: 52mm
Piston stroke: 58mm
Compression ratio: 8.5:1
Ignition timing:
5 mm or 31 deg. before Top Dead Center (TDC) with mechanical advance
device in full open position
Beaker points gap: 0.3-0.35
mm
Spark plug: W 240 T1,
gap: 0.6-0.7 mm
Valve clearance (cold engine,
piston at TDC, both valves closed): Intake valve: 0.05 mm, Exhaust valve:
0.08 mm
Valvetrain: OHC, hairpin-style
valve springs, camshaft driven by ULTRAMAX rods,
Carburetor: BING 2/20/16 main
jet:80, idle jet: 40 , needle jet: 2.68 , needle 2nd groove from top, idle
screw 1.5 turns open
Transmission: 4 speed
Frame: solid NSU sheetmetal
frame
Brakes: 140 mm drum brakes
Tire size: 2.75-19"
Weight: 132 kg
Max. weight: 290 kg
Length: 1987 mm
Gas tank volume: 10.8 ltr
Oil tank volume: 1.2 ltr, summer:
SAE 20, winter: SAE10. Change every 2000 km (MICRONIC filter every 6000
km). Let engine idle long enough to pump the oil up into the oil tank;
THEN check the dipstick!!!!)
Fuel consumption: 2.7 ltr/100
km
Top speed: 95 km/h
General information: The Superfox
has many features of the Supermax like the hi-tech engine . 1956: MICRONIC
paper oil filter, 1957: new carb (Bing 2/20/18), 1958: new crankshaft design
Updated: 11. Nov 99 22:36:39 by Hartmut
Schouwer
