+1 (671) 477-1776 | 256 E Marine Corps Dr., Hagatna, Guam, 96910, USA

Yamaha Cross Country Bike – YZ450FX



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.


  • 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.
  • Class-Leading Suspension
    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.



Engine Type: 449cc liquid-cooled DOHC 4-stroke; 4 titanium valves

Bore x Stroke: 97.0mm × 60.9mm

Compression Ratio: 13.0:1

Fuel Delivery: Mikuni® fuel injection, 44mm

Transmission:  5-speed; multiplate wet clutch

Final Drive: Chain


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

Seat Height: 37.6 in

Wheelbase: 58.3 in

Rake (Caster Angle): 27°

Trail: 4.6 in

Maximum Ground Clearance: 12.6 in

Fuel Capacity: 2.2 gal

Wet Weight***: 254 lb


Request a Quote

Additional information

Product Manufacturer