“Awesome! The YFZ450 changes everything!” Sometimes, words fail for a machine that raises the bar for high-performance ATVing. Having a 439cc liquid-cooled DOHC engine with 5 titanium valves and a race-inspired Keihin 39mm FCR carburettor, the YFZ450 also features a direct ignition coil, competition-derived clutch with on-the-fly adjustment knob, a state-of-the-art suspension system, ratchet-type 5-speed transmission and countless lightweight components. Even the tyres have been designed to be the best sport ATV tyres currently available. There′s a 45mm wide footpeg, tilted at the end for extra support on corners. The low, flat seat offers superb riding ergonomics. The YFZ450 is the perfect sports thoroughbred.
The YFZ450 is an out-and-out winner. Sleek, light, and extremely powerful, Yamaha′s flagship sport ATV is based on the experience gained from years of producing successful motocross bikes. The YFZ450 incorporates everything from adjustable brake and clutch levers to a flat, low seat for optimised sport riding. The camshaft, cylinder body, valves, cam chain tensioner and magnesium crankcase cover come straight from race-proven four-stroke motocross technology. The thinking behind it is simple: lighter weight, increased durability and exceptional performance. If the rich racing heritage isn′t enough, Yamaha′s reputation for fit and finish are sure to draw you in. The handlebar-mounted parking brake, no-tool filter air filter access, and easy chain adjustment help make the ride enjoyable and fun-filled.
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TYPE 1CYL.LIQ.COOLED. 4-STROKE VALVE TRAIN DOHC, 5-VALVE DISPLACEMENT 439 cc BORE AND STROKE 95 X 62mm COMPRESSION RATIO 11.9 : 1 LUBRICATION DRY SUMP CARBURETTOR KEIHIN 39 FCR W/TPS IGNITION ELECTRIC DC-CDI STARTER ELECTRIC FUEL TANK CAPACITY 10 LITRES FINAL TRANSMISSION CHAIN GEARBOX 5 SPEED CHASIS OVERALL LENGTH 1840 mm OVERALL WIDTH 1170 mm OVERALL HEIGHT 1090 mm SEAT HEIGHT 800 mm WHEELBASE 1280 mm DRY WEIGHT 159 kg BRAKES FRONT TWIN PISTON HYDRAULIC DOUBLE DISC BRAKES REAR HYDRAULIC DISC TYRES FRONT 21 X 7-10 RADIAL TYRES REAR 20 X 10-9 RADIAL COLOURS Blue, Black -
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The rear suspension linkage is made of forged aluminium for lightness and strength. 
Refinements include an aluminium shifter reducing weight even further, helping to make this the lightest weight sport ATV. 
Nitrogen-filled, (remote reservoir piggyback) double Kayaba shocks provide adjustable compression and rebound damping for different surfaces. 
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