Yamaha Yz 450 F
The Yamaha YZ450F was introduced in 2003 as an evolution of the YZ426F, featuring a more compact and refined 450cc four-stroke motocross engine. Over the years it has undergone significant redesigns, most notably in 2010 with a reverse-cylinder engine layout and in 2018 with electric start and launch control, cementing its reputation as one of the most advanced factory motocross bikes. It has been ridden to multiple AMA Supercross and Motocross championships, making it a benchmark in the 450cc motocross class.
~62 hp
Power
~52 Nm
Torque
110 kg
Weight
~145 km/h (note: estimated under optimal conditions on a straight; varies by rider and terrain)
Top Speed
Estimate: ~6-8 L/100km under typical motocross/off-road riding conditions (note: highly variable depending on riding intensity; not designed for road use)
Fuel
Naked
Body
What Buyers Should Know
Reverse Cylinder Engine
The YZ450F features a unique reverse-inclined engine layout that centralizes mass for sharper handling. This design is rare in motocross and gives it a distinct performance edge over competitors.
Watch the Valves
Valve clearance checks are critical on the YZ450F and should be inspected every 15-20 hours of riding. Neglected valve maintenance is the most common cause of costly engine damage on used examples.
Strong Resale Value
The YZ450F consistently holds its value better than most motocross bikes, largely due to Yamaha's reputation for reliability. A well-maintained example can retain 60-70% of its value after two years.
Full Specifications
Rivals & Alternatives
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