2014 Yamaha YZ450F and YZ250F – strictly for track use only

yz450fSaturday evening at the historic Maggiora circuit for the Italian Grand Prix saw the brand new 2014 YZ450F and 250F unveiled to the international press and many local fans with the factory Monster Energy team given the honours of uncovering the progressive new technology for the first time in Europe. 

2014 Yamaha YZ450F (Racing Blue and Sports White)

Joel Roelants, Dean Ferris, Christophe Charlier, Mel Pocock, Maxime Desprey as well as Yamaha Motor Europe representatives stood side-by-side for one of the most important Yamaha photo opportunities of the year, at the midway point of the FIM Motocross World Championship.

The feeling of nostalgia at Maggiora – back on the Grand Prix calendar for the first time this century and one of the special sites for motocross in Italy – was increased at the Yamaha event with the presence of Andrea Bartolini’s remarkable 1999 500cc World Championship winning YZ400f.

“It’s cool to see the new 450F for the first time and it definitely looks the part,” commented Ferris, scorer of two podium results this year with his works YZ250F, “I’ve heard good things about the engine and although I haven’t ridden it yet just seeing it now really makes me want to have a go.”

2014 Yamaha YZ250F (Racing Blue and Sports White)

The 2014 YZ250F features a brand new rear-slanted fuel injected motor with ‘snaking’ exhaust pipe system while the larger brother boasts a new chassis and further mass centralisation with Yamaha’s most useable and tractable engine yet.

2014 Yamaha YZ450F Technical Specs

YZ450F
Engine
Engine type liquid-cooled, 4-stroke, DOHC, 4-valves, rear ward slanting single cylinder
Displacement 449.7cc
Bore x stroke 97.0 mm x 60.8 mm
Compression ratio 12.5 : 1
Lubrication system Wet sump
Carburettor Fuel Injection
Clutch Type Wet, Multiple Disc
Ignition system TCI
Starter system Kick
Transmission system Constant Mesh, 5-speed
Final transmission Chain
Chassis
Frame Semi double cradle
Front suspension system Upside-down telescopic fork
Front travel 310 mm
Caster Angle 27º 25
Trail 122 mm
Rear suspension system Swingarm, (link suspension)
Rear Travel 310 mm
Front brake Hydraulic single disc, Ø 250 mm
Rear brake Hydraulic single disc, Ø 245 mm
Front tyre 80/100-21-51M
Rear tyre 110/90-19 62M
Dimensions
Overall length 2,180 mm
Overall width 825 mm
Overall height 1,280 mm
Seat height 965 mm
Wheel base 1,480 mm
Minimum ground clearance 335 mm
Wet weight (including full oil and fuel tank) 111 kg
Fuel tank capacity 7.5 litres
Oil tank capacity 0.9 litres

2014 Yamaha YZ250F Technical Specs

YZ250F
Engine
Engine type liquid-cooled, 4-stroke, DOHC, 4-valves
Displacement 250cc
Bore x stroke 77.0 mm x 53.6 mm
Compression ratio 13.5 : 1
Lubrication system Wet sump
Carburettor Fuel Injection
Clutch Type Wet, Multiple Disc
Ignition system TCI
Starter system Kick
Transmission system Constant Mesh, 5-speed
Final transmission Chain
Chassis
Frame Semi double cradle
Front suspension system Upside-down telescopic fork
Front travel 310 mm
Caster Angle 26º 50
Trail 118 mm
Rear suspension system Swingarm, (link suspension)
Rear Travel 315 mm
Front brake Hydraulic single disc, Ø 250 mm
Rear brake Hydraulic single disc, Ø 245 mm
Front tyre 80/100-21-51M
Rear tyre 100/90-19 57M
Dimensions
Overall length 2,170 mm
Overall width 825 mm
Overall height 1,280 mm
Seat height 965 mm
Wheel base 1,475 mm
Minimum ground clearance 330 mm
Wet weight (including full oil and fuel tank) 105 kg
Fuel tank capacity 7.5 litres
Oil tank capacity 0.9 litres

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