2009 Yamaha YZ450F, 2009 Yamaha YZ450F Key Features:

The bike that started the four-stroke revolution benefits from chassis refinements that ensure the five-titanium-valved YZ450F remains at the head of the open-class pack.

Subtle modifications to the suspension mean light, precise, confident handling at any speed.

Head and exhaust design delivers stronger low- to midrange power without sacrificing top end power.

Ready to race straight out of the crate—with a ProTaper® aluminum handlebar in adjustable clamps, titanium shock spring, gripper seat, Excel rims, etc.

Five-speed gearbox provides maximum flexibility and the right gear for a wide range of riding environments.

Dry sump lubrication system circulates more oil for the best durability in motocross.

Features & Benefits

Top triple clamp has two sets of mounting holes, providing 4 handlebar positions to suit a wide variety of riders: standard, 10mm back, or 10mm or 20mm forward.

Newly designed swingarm is lighter and helps to achieve excellentrigidity balance for superb cornering and rear wheel traction.

449cc, five-valve, DOHC, liquid-cooled engine is super-powerful yet tractable

39mm Keihin FCR flat-slide carburetor with throttle position sensor (TPS) and leak jet delivers precise fuel/air mixture and instant throttle response.

Extensively tested aluminum frame uses a mix of alloy castings, forgings and extrusions to produce a tuned-flex frame that makes the YZ the finest-handling motocross bike ever Speed-Sensitive System 48mm KYB® fork damping force is controlled by piston speed: provides a smoother, more precise ride.

Wide (55mm) footpegs provide excellent boot traction and rider comfort.

ProTaper® aluminum handlebar for strength and performance.