Yamaha has unveiled their all-new electric start YZ450F featuring the world’s first smartphone tuning app on a production motocross bike. Powered by a new reverse-head engine, this completely restyled YZ450F.
New reverse-head engine
With its newly developed high-tech reverse-head engine, this YZ450F gives you a wide spread of power for maximum race-winning potential. Featuring a new higher compression head, piston, cam profiles, cylinder geometry, air intake, ECU and much more – this MXGP-bred design gives you the factory performance you need to power into the victorYZone!
Power Tuner smartphone app
Connect with your dirt bike like never before with the world’s first smartphone app for our Power Tuner! Using your device’s touch screen, you can instantly fine-tune your fuelling and ignition settings to achieve optimum performance. And the sharing function also allows you to compare your settings and race logs with other YZ450F riders!
Lightweight electric starter
The fitment of an ultra-light and extremely compact electric starter gets you up and running at the push of a button. Weight is kept low by the use of a lithium-ion battery, and the electric start’s unique design means that the new engine’s compact external dimensions are the same size as before.
Yamaha explains the “Connected as One” as ‘This is the most complete motocross package we’ve ever created. And it’s also the first production bike that allows you to connect wirelessly and dial in your own customised engine settings – and maximise your winning potential.
The new lightweight electric start saves vital seconds when you’re under pressure – and the reverse-head engine gets a new high compression top end and optimised ECU for even stronger race winning power.
With its new lightweight frame and refined suspension, this YZ450F gives you improved stability and agility over whoops and through corners. And its slim and compact new bodywork delivers total rider agility combined with factory bike looks.’
Specifications:
Engine
| Engine type | liquid-cooled, 4-stroke, DOHC, 4-valves, rear ward slanting single cylinder |
| Displacement | 449cc |
| Bore x stroke | 97.0 mm x 60.8 mm |
| Compression ratio | 12.8 : 1 |
| Maximum power | – |
| Limited power version | N/A |
| Maximum torque | – |
| Lubrication system | Wet sump |
| Clutch type | Dual side grinded clutch plate |
| Fuel system | Fuel Injection |
| Ignition system | TCI |
| Starter system | Electric and kick |
| Transmission system | Constant Mesh, 5-speed |
| Final transmission | Chain |
| Fuel consumption | – |
| CO2 emission | – |
Chassis
| Frame | Bilateral Beam frame |
| Front suspension system | Upside-down telescopic fork |
| Front travel | 310 mm |
| Caster angle | 27º 15 |
| Trail | 121 mm |
| Rear suspension system | Swingarm, (Link type suspension), (link suspension) |
| Rear travel | 317 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 |
Dimensions
| Overall length | 2,185 mm |
| Overall width | 825 mm |
| Overall height | 1,285 mm |
| Seat height | 965 mm |
| Wheel base | 1,485 mm |
| Minimum ground clearance | 335 mm |
| Wet weight (including full oil and fuel tank) | 112 kg |
| Fuel tank capacity | 6.2 litres |
| Oil tank capacity |
0.95 litres |
Source: Yamaha UK
