Yamaha YZ450F 450cc Motocross Bike - Image 2

Yamaha YZ450F 450cc Motocross Bike - Image 3

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Yamaha YZ450F 450cc Motocross Bike - Image 5

Yamaha YZ450F 450cc Motocross Bike

Price range: $6,095.00 through $7,000.00

The class-leading Yamaha YZ450F – 450cc DOHC 4-stroke with 55.3HP, Yamaha Power Tuner App, Launch Control, and KYB SSS suspension. The ultimate motocross Holeshot machine.

SPECIFICATIONS:

MSRP: $6,095 Standard – $6,500 50th Anniversary – $7,000 2026 Edition – $6,700 70th Anniversary Edition
Power: 59.48 HP measured 2025 MXA dyno – 58.95 HP 2024 – 56.4 HP stock Aussie dyno – Marketed as 55HP+ – Your title “55HP Race Ready” is accurate and conservative
Engine: 449cc liquid-cooled DOHC 4-stroke single – 4 titanium valves – Bore x Stroke 97.0 x 60.8mm – Compression 13.0:1 – Mikuni fuel injection 44mm throttle body – TCI transistor controlled ignition – Electric start – Wet sump dry-sump lubrication with hidden oil tank in ignition cover
Transmission: Constant-mesh 5-speed – Wet multiplate clutch with Belleville washer – Chain final drive
Chassis: Aluminum Bilateral Beam Frame – Length 85.8in / 2179mm – Width 32.7in / 830mm – Height 50.2in / 1275mm – Wheelbase 58.3in / 1480mm – 58.1in for 2026 – Rake 26.9° – Trail 4.7in / 119mm – Ground Clearance 13.8in / 350mm – 13.6in for 2026
Suspension: KYB 48mm spring-type fork with Speed Sensitive Damping fully adjustable 12.2-in travel – KYB single shock fully adjustable 12.4-in – 2026 gets new KYB shock and revised fork settings 11.6-in rear
Brakes / Wheels: Front 270mm floating hydraulic – Rear 240mm hydraulic – Dunlop Geomax MX33 80/100-21 front 120/80-19 rear – Seat Height 38in – 38.0in for 2026 – Wet Weight 240 lbs / 108.9kg – 243 lbs claimed 2026 – Fuel Capacity 1.6 gal / 6.2L

Edition

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Yamaha YZ450F – The Holeshot King | 2025 Motocross Champion

The Yamaha YZ450F is the most technologically advanced 450cc motocross bike on the market. Winner of Best Motocross Bike 2024, this machine was completely redesigned for ultimate power, precision handling, and rider customization. With 55.3 HP @ 9,600 RPM and 33.8 lb-ft of torque, it’s the most powerful production 450 Yamaha has ever built.

Available now at Flash E-Bikes – www.flashe-bikes.com.

Why The YZ450F Dominates The 450 Class?

All-New 449cc Reverse-Head Engine With Massive Power

Built around a liquid-cooled, DOHC 4-stroke engine with 4 titanium valves, rearward-slanted cylinder, and 13.0:1 compression ratio. Bore x Stroke: 97.0mm x 60.8mm. Features Mikuni fuel injection with ultra-compact 44mm throttle body and Yamaha Fuel Injection (YFI). The reversed head design with wraparound exhaust centralizes mass for incredible cornering. The result is linear, controllable power from bottom to top.

Yamaha Power Tuner App & Ultimate Adjustability

Unlike any other bike, tune your YZ450F from your phone. The free Yamaha Power Tuner App lets you adjust fuel maps, ignition timing, traction control, launch control, lap timer, and maintenance logs via WiFi. Handlebar-mounted map switch allows on-the-fly switching between 2 custom maps. Traction Control System keeps the power hooked up. Launch Control System gives you the holeshot every time.

Industry-Leading KYB Speed Sensitive System Suspension

Fully adjustable KYB coil spring-type 48mm inverted fork with speed-sensitive damping, tool-less compression clickers, and 12.2″ travel. KYB fully adjustable single shock with revised valving and 12.4″ travel via linkage. The most compliant, most praised suspension in motocross – absorbs braking bumps and big jumps without compromise.

Ultra-Light Bilateral Beam Frame

All-new aluminum bilateral beam frame concentrates engine mass, fuel tank (1.6 gal), and airbox at the center for lighter handling. Slimmer bodywork, flatter seat, narrower radiator shrouds improve rider mobility. Only 240 lbs wet – one of the lightest 450s despite electric start and lithium-ion battery.

Technical Specifications

Feature	Details
Engine Type	449cc Liquid-Cooled, DOHC 4-Stroke, 4 Titanium Valves, Rearward-Slanted Cylinder
Displacement	449cc
Bore x Stroke	97.0mm x 60.8mm
Compression Ratio	13.0:1
Horsepower	55.3 HP @ 9,600 RPM (Dirt Rider Measured) / 52.8 HP Crank
Torque	33.8 lb-ft @ 7,200 RPM / 43.9 Nm @ 7,600 RPM
Fuel System	Mikuni Fuel Injection, 44mm Throttle Body
Starting	Electric Start with Lightweight Lithium-Ion Battery
Transmission	Constant Mesh 5-Speed, Multiplate Wet Clutch, Tri-Shaft Layout
Electronics	Yamaha Power Tuner App (WiFi), 2-Mode Map Switch, Traction Control, Launch Control
Frame	Aluminum Bilateral Beam
Front Suspension	KYB SSS 48mm Coil Spring Fork, Fully Adjustable, 12.2″ / 310mm Travel
Rear Suspension	KYB Single Shock, Fully Adjustable, 12.4″ / 315mm Travel, Linkage Type
Front Brake	Hydraulic Disc 270mm, Nissin Caliper
Rear Brake	Hydraulic Disc 240mm, Reduced Hose Rigidity for Better Control
Tires	Front: 80/100-21 Dunlop Geomax MX33F / Rear: 120/80-19 Dunlop Geomax MX33
Seat Height	38.0 in / 965mm
Wheelbase	58.3 in / 1481mm
Ground Clearance	13.8 in / 351mm
Fuel Capacity	1.6 Gallons / 6.1 Liters
Wet Weight	240 lbs / 108.9 kg (Full Fuel)
Top Speed	85-90 MPH / 140-180 KM/H
MSRP	$6,095
Colors	Team Yamaha Blue, Monster Energy Yamaha Racing Edition, 50th Anniversary Yellow

Why Buy YZ450F From Flash E-Bikes?

At Flash E-Bikes, we deliver more than a bike – we deliver championship pedigree. The YZ450F is in stock with fast nationwide shipping, secure checkout, and race-ready prep. Dominate your local track with the bike that pros choose.

FAQs

Q: How much HP does the Yamaha YZ450F have?
A: The 2024-2025 YZ450F produces 55.3 HP at the rear wheel, making it one of the most powerful 450 motocross bikes.

Q: What is the weight of the YZ450F?
A: Claimed wet weight is 240 lbs (108.9 kg) with full fuel, extremely light for an electric start 450.

Q: Does the YZ450F have WiFi tuning?
A: Yes, via the free Yamaha Power Tuner App you can tune fuel and ignition maps, traction control, launch control, and monitor maintenance from your smartphone.