Featuring a new, more powerful engine, an updated frame, and the smartphone Power Tuner app to dial-in the bike's settings to fit your style and conditions.
449cc liquid-cooled DOHC 4-stroke; 4 titanium valves
Bore x Stroke
97.0mm × 60.9mm
Mikuni® fuel injection, 44mm
5-speed; multiplate wet clutch
Suspension / Front
KYB® spring-type fork with speed sensitive damping; fully adjustable, 12.2-in travel
Suspension / Rear
KYB® single shock; fully adjustable, 12.5-in travel
Brakes / Front
Hydraulic disc, 270mm
Brakes / Rear
Hydraulic disc, 245mm
Tires / Front
80/100-21 Dunlop® MX3S®
Tires / Rear
120/90-18 Dunlop® MX3S®
L x W x H
85.6 in x 32.5 in x 50.4 in
Rake (Caster Angle)
Maximum Ground Clearance
YZ450F™-Based GNCC® and Hare Scrambles Focused Racer
The YZ450FX™ is developed from Yamaha’s flagship motocross model—the YZ450F—with many added features and unique settings that make the YZ450FX the ultimate GNCC®/Woods racer.
Yamaha Power Tuner App
Yamaha’s free of charge and industry-exclusive Power Tuner app puts the flexibility and precision tunability of the GYTR® Power Tuner into your smartphone. Make fueling and ignition timing changes instantly and upload them to the bike for the ultimate in track-side tuning.
Adjustable Engine Mapping
A handlebar-mounted map switch allows the rider to quickly select between preloaded engine maps—loaded and configured in the Power Tuner app—to account for changing track and weather conditions. Map 1 provides more responsive, quicker revving engine characteristics while Map 2 provides smoother response, slower revving characteristics for when traction is limited.
Electric Starter System
Utilizing a compact starter motor and ultra-lightweight lithium battery, the YZ450FX maintains the convenience of push-button starting for effortless restarts under pressure and relaxed riding when the clock isn’t ticking.
Potent Fuel-Injected Engine
A high-compression cylinder head, forged piston, aggressive cam profiles, cylinder geometry and much more work together to give riders the ideal power spread in challenging GNCC® racing conditions.
Yamaha uses KYB® spring-type forks on all of our YZ® models, with industry-leading function and easy set-up at the track—these forks are ready for the top step of the podium straight out of the box.
We offer lifetime Engine Warranty.
No-Risk Extended Warranties.
50% Off Service Plans.
Employee pricing on all gear and accessories on the day of sale.
Financing for everyone.
Call Cycle Springs Powersports for all your Dirt Bike, Motocross, Enduro & MX Motorcycle questions! 727-771-1211