The 2019 YZ450FX utilises an all-new engine design that features a new cylinder head, piston, camshaft profiles, cylinder geometry and more – all working together to deliver class-leading power and even more controllability for Cross Country racing.

Its bilateral beam frame is all-new with an optimised engine mounting position to improve the machine’s rigidity balance, resulting in enhanced cornering ability and traction.

Type Liquid-cooled, DOHC, 4-stroke, 4-valves, rearward slanting single
Displacement 449cc
Bore x stroke 97.0 mm x 60.8 mm
Compression ratio 12.8 : 1
Maximum horse power –
Maximum torque –
Starting system type Electric
Lubrication system Wet sump
Clutch type Dual side grinded clutch plate
Fuel system Fuel Injection
Ignition system TCI
Transmission system Constant mesh, 5-speed
Final transmission system Chain
Frame Bilateral beam frame
Front suspension Upside-down telescopic fork
Front wheel travel 310 mm
Rear suspension Swingarm, (link suspension)
Rear wheel travel 317 mm
Caster angle 27⁰ 15′
Trail 121 mm
Front brake Hydraulic single disc, Ø 270 mm
Rear brake Hydraulic single disc, Ø 245 mm
Front tyre 80/100-21 51M
Rear tyre 110/90-19 62M
Overall length 2,185 mm
Overall width 825 mm
Overall height 1,285 mm
Seat height 965 mm
Wheelbase 1,485 mm
Min. ground clearance
335 mm
Wet weight (including full oil and fuel tank)
112 kg
Fuel tank capacity
6.2 L
Oil capacity
0.95 L
Power Tuner App
It enables the rider to modify fuel and iginition settings for optimized
performance using a smartphone. The app communicates wirelessly with the
CCU unit.

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