Motorcycle News (UK) - - This Week -

Yamaha have com­pletely over­hauled the YZ450F in­clud­ing a new en­gine, frame and body­work as well as ad­ding wi-fi con­nec­tiv­ity that al­lows you to change the bike’s fuelling us­ing an app.

The re­verse-cylin­der 450cc en­gine has been mod­i­fied heav­ily in­clud­ing a new light­weight cylin­der head, new cam pro­files, new crank­shaft, new light­weight elec­tric starter and higher com­pres­sion pis­ton. The po­si­tion of the en­gine has also been moved to im­prove weight distri­bu­tion in the frame and im­prove cool­ing. The big­gest change is the re­lease of the new Power Tuner smart­phone app, which al­lows rid­ers to con­nect their phone to their bike and make in­stant changes to the fuel and ig­ni­tion maps.

Yamaha have also cre­ated a new bi­lat­eral beam frame that they say in­creases rigid­ity while im­prov­ing mass cen­tral­i­sa­tion. The seat is nar­rower and flat­ter to make a slim­mer and more com­pact body, which is helped by the slim­mer 6.2 litre fuel tank.

We can also ex­pect two spe­cial edition en­duro race bikes in­spired by Yamaha’s en­duro team. All three mod­els will be avail­able in Au­gust.

You can adjust your new YZ450F’S fuelling us­ing your phone

‘Can I bor­row your phone? Mine’s out of juice'

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