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NSU Maxi 175cc

NSU Maxi Type 175 OSB

Production: 1957-1964
Units built: 1957: 5000 - 1958: 1189 - 1959: 1854 - 1960: 3067 - 1961: 4460 - 1962: 2401 - 1963: 7500 - 1964: 6000
Engine: 1 cylinder four-stroke, dry sump with external oil tank and MICRONIC paper oil filter
HP: 12.5 at 6500 rpm
Engine displacement: 174cc
Cylinder diameter: 62mm
Piston stroke: 58mm
Piston to cylinder wall clearance: 0.05 mm
Compression ratio: 7.5:1 max.7.9:1
Ignition timing: 5.5 mm or 32 deg. before Top Dead Center (TDC) with mechanical spark advance device in full open position
Spark plugs: W 240 T1,  gap: 0.6-0.7 mm
Valve clearance (cold engine, piston in UDC, both valves closed): Intake valve: 0.08 mm, Exhaust valve: 0.08 mm
Valvetrain: OHC, camshaft driven by ULTRAMAX rods, hairpin-style valve springs
Carburetor: BING 2/22/27 main jet:85, idle jet 35, needle jet 2.66, needle 2nd groove from top, idle screw 1.5 turns open
Transmission: 4 speed
Frame: pressed steel
Brakes: 140 mm drum brakes
Tyre size: 3.25-18"
Weight: 124 kg
Length: 1997 mm
Maximum weight: 293 kg
Gas tank volume: 10.8 ltr
Oil tank volume:1.4 ltr, summer: SAE 20, winter: SAE10. Change every 2000 km. Let engine idle long enough to pump the oil up into the oil tank; THEN check the dipstick)
Fuel consumption: 3.2 to 3.5 ltr/100 km
Top speed: 110 km/h
General information: The Maxi has many features of the Supermax ("little sister of the Max"), although the design is actually an improved Superfox design.


A: generator
B: ignition switch board
C: battery
D: headlight bulb
E: parking light bulb
F: taillight bulb
G: brake light bulb
H: generator control bulb
I: speedometer bulb
L: headlight dimmer switch
M: horn actuator
N: horn
O: brake light switch
S: spark plug W240T1
T: negative ground
U: fuse

a: black b: red c: brown d: yellow e: white f: blue g: green

Source: Hartmut Schouwer