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German Motorcycles

NSU Max

NSU Max 1954.jpg
NSU Max 1954


 

1) NSU Max Standard (Type 251 OSB)

Production: 1952-1954
Units built (Standard and Spezial): 1952: 62, 1953: 24403, 1954: 25528, 1955: 24254, 1956: 7400
Engine: 1 cylinder 4-stroke, dry sump with external oil tank and oil filter
HP: 17 at 6500 rpm
Engine displacement: 247 cc
Cylinder diameter: 69 mm
Piston stroke: 66 mm
Piston to cylinder wall clearance: 0.05 mm
Compression ratio: 7.4:1
Ignition timing: 7.6 mm or 36 deg. before Top Dead Center (TDC) with mechanical spark advance device in full open position
Spark plugs: W 240 T11, gap: 0.7 mm
Valve clearance (cold engine, piston in TDC, both valves closed): Intake valve: 0.05 mm, Exhaust valve: 0.10 mm
Valvetrain: OHC, camshaft driven by ULTRAMAX rods, hairpin-style valve springs
Carburetor: BING 2/26/25 main jet:105, idle jet 45, needle jet 2.68, needle first groove from top, idle screw 1.5 turns open
Transmission: 4 speed
Frame: solid NSU sheetmetal frame
Brakes: 160 mm drum brakes
Tire size: 3.25-19" (if equipped with sidecar: 3.50-19" at the rear wheel)
Weight: 155 kg
Maximum weight: 310 kg
Length: 2051 mm
Gas tank volume: 12 ltr
Oil tank volume: 2 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 ltr/100 km
Top speed: 126 km/h (with passenger: 116 km/h)
General information: narrow brake drums. up to frame# 1243066 separate float chamber (fixed to the frame).

2) NSU Max Spezial (Type 251 OSB)

Production: 1954-1956
Engine: 1 cylinder 4-stroke, dry sump with external oil tank and oil filter
HP: 17 at 6500 rpm
Engine displacement: 247 cc
Cylinder diameter: 69 mm
Piston stroke: 66 mm
Piston to cylinder wall clearance: 0.05 mm
Compression ratio: 7.4:1
Ignition timing: 7.6 mm or 36 deg. before Top Dead Center (TDC) with mechanical spark advance device in full open position
Spark plugs: W 240 T11, gap: 0.7 mm
Valve clearance (cold engine, piston in TDC, both valves closed): Intake valve: 0.05 mm, Exhaust valve: 0.10 mm
Valvetrain: OHC, camshaft driven by ULTRAMAX rods, hairpin-style valve springs
Carburetor: BING 2/26/25 main jet:105, idle jet 45, needle jet 2.68, needle first groove from top, idle screw 1.5 turns open
Transmission: 4 speed
Frame: solid NSU sheetmetal frame
Brakes: 180 mm alloy drum brakes
Tire size: 3.25-19" (if equipped with sidecar: 3.50-19" at the rear wheel)
Weight: 165 kg
Maximum weight: 315 kg
Length: 2051 mm
Gas tank volume: 14 ltr
Oil tank volume: 2 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 ltr/100 km
Top speed: 126 km/h (with passenger: 116 km/h)
General information: frame numbers 1274974 to 1830800, engine numbers 775575 to 3224061, full width alloy brake drums.

3) NSU Supermax (Type 251 OSB)

Production: late 1956-1963
Units built: 1956: 4440, 1957: 2563, 1958: 2357, 1959: 1403, 1960: 2619, 1961: 1240, 1962: 473, 1963: 378
Engine: 1 cylinder 4-stroke, dry sump with external oil tank and MICRONIC paper oil filter
HP: 18 at 6900 rpm
Engine displacement: 247 cc
Cylinder diameter: 69 mm
Piston stroke: 66 mm
Piston to cylinder wall clearance: 0.05 mm
Compression ratio: 7.4:1
Ignition timing: 7.6 mm or 36 deg. before Top Dead Center (TDC) with mechanical spark advance device in full open position
Spark plugs: W 240 T11, gap: 0.7 mm
Valve clearance (cold engine, piston in TDC, both valves closed): Intake valve: 0.05 mm, Exhaust valve: 0.10 mm
Valvetrain: OHC, camshaft driven by ULTRAMAX rods, hairpin-style valve springs
Carburetor: BING 2/26/55 main jet:100, idle jet 45, needle jet 2.68, needle first groove from top, idle screw 1.5 turns open
Transmission: 4 speed
Frame: solid NSU sheetmetal frame
Brakes: drum brakes
Tire size: 3.25-19" (if equipped with sidecar: 3.50-19" at the rear wheel)
Weight: 174 kg
Maximum weight: 315 kg
Length: 2051 mm
Gas tank volume: 14 ltr
Oil tank volume: 2 ltr, summer: SAE 20, winter: SAE10. Change every 2000 km. Change MICRONIC paper oil filter every 6000 km. Let engine idle long enough to pump the oil up into the oil tank; THEN check the dipstick!!!!)
Fuel consumption: 3.2 ltr/100 km
Top speed: 126 km/h (with passenger: 116 km/h)
General information: frame numbers 1830801 and up, engine numbers 3224062 and up. Two rear struts with shock absorbers instead of the single central unit of the earlier models (except some "Supermaxes" sold in New Zealand which were leftover Spezialmaxes) . MICRONIC paper oil filter.

4) NSU Max 300 (Export, Type 301 OSB)

Production: 1955-?
Engine: 1 cylinder 4-stroke, dry sump with external oil tank and oil filter
HP: 21 at 6600 rpm
Engine displacement: 297 cc
Cylinder diameter: 72 mm
Piston stroke: 73 mm
Compression ratio: 7.6:1
Ignition timing: 8.4 mm before Top Dead Center (TDC) with mechanical spark advance device in full open position
Spark plugs: W 240 T11, gap: 0.7 mm
Valve clearance ?
Valvetrain: OHC, camshaft driven by ULTRAMAX rods, hairpin-style valve springs
Carburetor: BING 2/27.5/5 main jet:110, idle jet 45, needle jet 2.66, or BING 2/27.5/7 main jet:100, idle jet 50, needle jet 2.66
Transmission: 4 speed
Frame: solid NSU sheetmetal frame
Brakes: drum brakes
Tire size: 3.25-19" (if equipped with sidecar: 3.50-19" at the rear wheel)
Gas tank volume: 14 ltr
Oil tank volume: 2 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 ltr/100 km
Top speed: ? km/h
General information: Identification by "300" at cylinder and cylinderhead, extra "3" near engine number
: 1955-?
Engine: 1 cylinder 4-stroke, dry sump with external oil tank and oil filter
HP: 21 at 6600 rpm
Engine displacement: 297 cc
Cylinder diameter: 72 mm
Piston stroke: 73 mm
Compression ratio: 7.6:1
Ignition timing: 8.4 mm before Top Dead Center (TDC) with mechanical spark advance device in full open position
Spark plugs: W 240 T11, gap: 0.7 mm
Valve clearance ?
Valvetrain: OHC, camshaft driven by ULTRAMAX rods, hairpin-style valve springs
Carburetor: BING 2/27.5/5 main jet:110, idle jet 45, needle jet 2.66, or BING 2/27.5/7 main jet:100, idle jet 50, needle jet 2.66
Transmission: 4 speed
Frame: solid NSU sheetmetal frame
Brakes: drum brakes
Tire size: 3.25-19" (if equipped with sidecar: 3.50-19" at the rear wheel)
Gas tank volume: 14 ltr
Oil tank volume: 2 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 ltr/100 km
Top speed: ? km/h
General information: Identification by "300" at cylinder and cylinderhead, extra "3" near engine number

5) NSU Max Scrambler (for U.S. market only)

Production: late 50s
Engine: 1 cylinder 4-stroke, dry sump with external oil tank and oil filter
HP: Supermax engines with slightly increased performance
Engine displacement: ? cc
Cylinder diameter: ? mm
Piston stroke: ? mm
Piston to cylinder wall clearance: ? mm
Compression ratio: ?
Ignition timing: ? mm or ? deg. before Top Dead Center (TDC) with mechanical spark advance device in full open position
Spark plugs: ?, gap: ? mm
Valve clearance (cold engine, piston in TDC, both valves closed): Intake valve: ? mm, Exhaust valve: ? mm
Valvetrain: OHC, camshaft driven by ULTRAMAX rods, hairpin-style valve springs
Carburetor: ? main jet:?, idle jet: ?, needle jet ?, needle ? groove from top, idle screw ? turns open
Transmission: 4 speed
Frame: solid NSU sheetmetal frame
Brakes: drum brakes
Tire size: ?
Weight: ? kg
Maximum weight: ? kg
Length: ? mm
Gas tank volume: ? ltr
Oil tank volume: ? ltr,
Fuel consumption: ?
Top speed: ?
General information: Off-road design. Almost no information about this bike available . . . We need YOUR info here!

Most information on this page courtesy Hartmut Schouwer www.schouwer-online.de/

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