Picture for 1998 Yamaha YZ400F
Specs for 1998 Yamaha YZ400F
Engine type Liquid cooled 4-stroke, DOHC, 5-valve
Displacement 399 cc
Bore x stroke 92.0 x 60.1 mm
Compression ratio 12.5 : 1
Lubrication system Dry sump
Fuel System Carburettor (FCR39H)
Clutch type Wet, multiple disc
Ignition system C.D.I.
Starter system Kickstarter
Transmission system Constant mesh, 5 speed
Primary reduction ratio 2.952
Secundary reduction ratio 3.500
Final transmission Chain
Ratios gearbox 1st 1.929
Ratios gearbox 2nd 1.563
Ratios gearbox 3rd 1.278
Ratios gearbox 4th 1.091
Ratios gearbox 5th 0.952
Front suspension system Telescopic fork, USD
Front wheel travel 300 mm
Rear suspension system Swingarm (Link suspension)
Rear wheel travel 315 mm
Caster angle 27.8°
Trail 123 mm
Front brake Single disc, Ø 245 mm
Rear brake Single disc, Ø 220 mm
Front tyre 80/100-21 51M
Rear tyre 110/90-19 57M
Overall length 2,176 mm
Overall width 827 mm
Overall height 1,303 mm
Seat height 991 mm
Wheelbase 1,495 mm
Minimum ground clearance 373 mm
Service weight (incl. liquids) 115 kg
Fuel tank capacity (reserve) 8 L
Engine oil tank capacity 1.7 L