All-new Yamaha YZ450F leads 2020 motocross range

Ben Purvis_BikeSocial
By Ben Purvis

Writing about bikes for 20 years. Published in dozens of titles on five continents. Mildly obsessed with discovering how things work.

All-new Yamaha YZ450F leads 2020 motocross range


It’s not easy to visually pick out the changes that Yamaha has made to its newly-announced 2020 YZ450F motocrosser but under the skin they’re extensive enough for the firm to refer to the bike as ‘all-new’.

The recipe is the usual one: more power, less weight and better handling. We hear the same every year, and on this occasion Yamaha has done it by carefully examining each part to see what can be improved rather than by starting out with a clean sheet.

Starting with the engine, the reverse-cylinder single is physically more compact than before, with a new, smaller cylinder head. Inside there’s a new piston and a longer con-rod, changes to the combustion chamber and steeper valve angles. The extra power that Yamaha claims throughout the rev range is pushed through a tweaked transmission that’s claimed to give improved shifting.

The engine sits in a frame that looks exactly like the old one but features thinner alloy main spars to make it lighter and improve its flex characteristics. In contrast, the down-tubes are thicker than before.

As usual, there are year-on-year improvements to the suspension via tweaked settings, and the brakes are revised with new calipers front and rear.

Yamaha’s phone-app-based Power Tuner remains, along with launch control. The 2020 YZ450F will be in dealers in August.

The remaining bikes in Yamaha’s 2020 off-road range, including the YZ250F, YZ250, YZ125, YZ85LW and YZ65 remain essentially unchanged other than new graphics.


All-new Yamaha YZ450F leads 2020 motocross range
Latest News from Bike Social

Latest News

  • Triumph Moto2 Daytona 765 specs, power and performance first look
    Triumph Moto2 Daytona 765 first look
  • Maria Costello MBE chats to BikeSocial at the Classic TT
    Costello on the Classic TT
  • From the four races over the Isle of Man Classic TT weekend, here’s the breakdown of what can race in each class
    Classic TT 2019 | Classes Guide
  • Classic TT 2019 | Top 10 Ones to Watch
    Classic TT 2019 | Top 10 Ones to Watch