Pro-Bike Yamaha

YZ450F - Undisputed MX1 class leader
With Josh Coppins leading the ‘07 MX1 series – and the bike’s unrivalled track record from ’06 that includes winning 27 out of 30 heats – the YZ450F is officially today’s most successful MX1 bike!

For 2008 season the undisputed class leader’s engine gets a number of significant improvements – including reshaped intake ports and cam profiles, reduced piston tolerance and modified transmission backlash. And the YZ450F’s lightweight aluminium chassis runs with a shorter headpipe, lighter forks, compact new front caliper, and modified rear suspension – which makes the 2008 bike accelerate better, turn quicker and feel lighter, for an even more dominant package!

Engine -
Engine type: Liquid-cooled, 4-stroke, DOHC, 5 titanium valves, Forward-inclined single cylinder
Displacement: 449 cc
Bore x stroke: 95.0 x 63.4 mm
Compression ratio: 12.3:1
Lubrication system: Dry sump
Carburettor: Keihin FCR-MX39/1
Clutch type: Wet, multiple-disc
Ignition system: CDI
Starter system: Kick
Transmission system: Constant mesh, 5 speed
Final transmission: Chain
Fuel tank capacity: 7.0 L
Oil tank capacity: 1.2 L

Chassis -
Chassis: Semi-double cradle
Front suspension system: Telescopic forks
Front travel: 300 mm
Rear suspension system: Swingarm (link suspension)
Rear travel: 313 mm
Front brake: Single disc, Ø 250 mm
Rear brake: Single disc, Ø 245 mm
Front tyre: 80/100-21 51M
Rear tyre: 110/90-19 62M

Dimensions -
Length (mm): 2,195 mm
Width (mm): 825 mm
Height (mm): 1,306 mm
Seat height (mm): 1,001 mm
Wheel base (mm): 1,495 mm
Minimum ground clearance (mm): 375 mm
Dry weight (kg) 99.5 kg