Positioned in CZ's cross - motocross motorcycle lineup, the 1974 CZ 400 MX Type 981 utilizes a 400 cc (24.4 cu in) air-cooled single cylinder, two-stroke layout. In factory specification, peak output is rated at 42 HP (30.7 kW) at 6,800 rpm, transferring power to the rear wheel through a 4-speed gearbox and chain final drive. With a specific output of 105 HP per liter, the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.
On the scales, the 400 MX Type 981 measures 106 kg (234 lbs) dry, translating to a power-to-weight ratio of 0.4 HP/kg (2.52 kg per horsepower). Rider ergonomics and chassis geometry center around a 836 mm (32.9 in) seat height — resulting in a taller command-style riding posture suited to medium-to-tall inseams, combined with a 1,390 mm (54.7 in) wheelbase engineered for quick, flickable steering geometry. The 8-liter (2.1 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 81 km/h (50 mph).
Specific Output
105 HP/L
Power-to-Weight
0.4 HP/kg (2.52 kg/HP)
Standover Height
836 mm (32.9 in)
Engine
Displacement400.0 ccm (24.41 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine Details400 cc
Power42.0 HP (30.7 kW)) @ 6800 RPM
Compression10.5:1
Bore x Stroke82.0 x 72.0 mm (3.2 x 2.8 inches)
Valves/Cylinder2
Fuel SystemCarburettor. Jikov 2932 2760
Ignitionby flywheel 6v
CoolingAir
Transmission
Gearbox4-speed
Final DriveChain (final drive)
Performance
Top Speed80.5 km/h (50.0 mph)
ExhaustSingle expansion chamber
Chassis
Frame TypeTubular steel
Front SuspensionOil filled 170mm gravelly
Front Travel170 mm (6.7 inches)
Rear SuspensionMp 22x90
Rear Travel90 mm (3.5 inches)
Wheelbase1390 mm (54.7 inches)
Ground Clearance236 mm (9.3 inches)
Wheels & Brakes
Front Tyre3.00-21
Rear Tyre4.00-18
Front BrakesExpanding brake (drum brake). Internal expanding
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
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Seat Height
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Weight
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Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
