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YZ400F

Category: Motocross
Manufacturer: Yamaha show models
Hits: 792
Year 1979
Engine Class 400
VIN Prefix 2X5
Known VIN Range (Vehicle ID Numbers) 000101 -
Tank Color(s) Competition Yellow
Country of Sale USA
Bore (MM) 82
Stroke (MM) 75
Displacement (CC) 397
Compression Ratio (to 1) 7.4
BHP @ RPM 39.9 @ 7,000
Torque (kgm) @ RPM 4.02 @ 7,000
Autolube Injection? No
Engine Cooling Air
Carburetor Model VM38SS
Ignition Type CDI (Electronic)
Ignition Timing MM (BTDC) 3.1
Primary Drive Gearing 2.61
Final Drive Gearing (Sprockets) 50/14
Box Gearing First 2.38
Box Gearing Second 1.75
Box Gearing Third 1.32
Box Gearing Fourth 1.05
Box Gearing Fifth 0.83
Fuel Capacity (L) 7.6
Gearbox Oil Capacity 0.85
Fork Oil Capacity (CC/Fork Leg) 364
Front Tire (stock) 3.00 x 21
Rear Tire (stock) 5.10 X 18
Front Brake Type Drum
Rear Brake Type Drum
Rear Suspension Mono Shock
Front Suspension Travel (mm) 270
Rear Suspension Travel (mm) 265
Rake (degrees) 29.5
Trail (mm) 128
Overall Width (mm) 935
Ground Clearance (mm) 320
Wheelbase (mm) 1,450
Dry Weight (kg) 102

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