???? 2027 Yamaha YZ450F

The pinnacle of Yamaha motocross performance. The 2027 Yamaha YZ450F is built for riders who expect championship-level power, precision handling, premium suspension, and serious adjustability straight from the factory. Powered by Yamaha's potent 450cc DOHC four-stroke engine, the YZ450F combines a compact aluminum chassis, fully adjustable KYB suspension, advanced electronics, smartphone tuning, traction control, and launch control into one purpose-built motocross machine. (Yamaha Motorsports)

At its heart is a 450cc liquid-cooled DOHC four-stroke single-cylinder engine featuring four titanium valves, a forged aluminum piston, reversed cylinder-head layout, dry-sump lubrication, and 44mm Mikuni fuel injection. Yamaha designed the engine around broad, usable pulling power throughout the rev range rather than performance concentrated in one narrow area. (Yamaha Motorsports)

?? Performance Features:

?? 450cc liquid-cooled DOHC 4-stroke engine

?? 4 titanium valves

?? 13.0:1 compression ratio

?? 44mm Mikuni fuel injection

?? Reversed cylinder-head layout

? Lightweight forged aluminum piston

?? Dry-sump lubrication

?? Compact 5-speed constant-mesh transmission

? Advanced disc-spring multiplate wet clutch

? Electric start

?? Yamaha Power Tuner App connectivity

?? Adjustable Launch Control

?? Three-level Traction Control

?? ECU Anti-Theft Lock through the Power Tuner App

??? Advanced aluminum bilateral-beam frame

?? Fully adjustable KYB Speed Sensitive System coil-spring fork

?? 12.2 inches of front suspension travel

?? Fully adjustable KYB rear shock

??? Hand-adjustable low-speed compression clicker

?? 11.6 inches of rear suspension travel

?? 270mm hydraulic front disc

?? Lightweight 220mm hydraulic rear disc

?? Dunlop Geomax MX33F/MX33 tires

?? Four-position adjustable, rubber-mounted handlebar

?? Slim, flat rider-focused bodywork

?? Wide competition footpegs

?? Gold drive chain. (Yamaha Motorsports)

?? Tune It From Your Phone

One of the YZ450F's standout features is Yamaha's Power Tuner App, which turns a compatible smartphone into a powerful trackside tuning tool.

Riders can adjust fuel delivery and ignition timing, select traction-control settings, customize Launch Control, record race information, monitor engine run time and maintenance data, and access engine and suspension setup guides. Yamaha also includes a simplified tuning slider for riders who want to quickly change the bike's character without building a detailed custom map. (Yamaha Motorsports)

For 2027, the system also includes an ECU Anti-Theft Lock, allowing the owner to lock the ECU through the Power Tuner App to help prevent unauthorized engine starts. (Yamaha Motorsports)

?? Championship-Level KYB Suspension

The YZ450F continues with Yamaha's highly regarded KYB Speed Sensitive System coil-spring fork, offering full adjustability and 12.2 inches of travel.

At the rear, a fully adjustable KYB shock provides 11.6 inches of travel and includes a convenient hand-operated low-speed compression clicker for easier trackside adjustments. (Yamaha Motorsports)

The suspension works with Yamaha's aluminum bilateral-beam frame, engineered to balance rigidity and controlled flex for confident corner entry, stability, traction, and rider feedback. (Yamaha Motorsports)

?? Lightweight Rear Brake System

The 2027 YZ450F receives a newly redesigned rear braking system.

Yamaha reduced the size of the rear caliper and master-cylinder pistons, revised the brake hose and rotor bolts, and uses a 220mm rear disc. According to Yamaha, the changes save approximately 180 grams while improving braking force, controllability, and linear feel. (Yamaha Motorsports)

Up front, a large 270mm hydraulic disc with a Nissin caliper delivers the strong, predictable stopping performance expected from a competition 450. (Yamaha Motorsports)

?? Race-Ready Specifications

The 2027 YZ450F weighs just 243 pounds wet and combines that lightweight feel with a 38.0-inch seat height, 58.1-inch wheelbase, 13.6 inches of ground clearance, and 1.6-gallon fuel capacity. (Yamaha Motorsports)

Tire sizes are competition-ready 80/100-21 Dunlop Geomax MX33F up front and 120/80-19 Geomax MX33 at the rear. (Yamaha Motorsports)

?? Why You'll Love It

The 2027 Yamaha YZ450F is designed for riders who want a true competition motocross machine rather than a trail bike dressed like one.

You get Yamaha's broad-pulling 450cc four-stroke power, premium fully adjustable KYB suspension, a lightweight aluminum frame, disc-spring clutch, powerful Nissin brakes, electric start, adjustable traction and launch control, and one of the most comprehensive smartphone-based tuning systems in motocross. (Yamaha Motorsports)

And for riders who want the factory-race look, Yamaha also offers the 2027 YZ450F Monster Energy Edition with exclusive Monster Energy Yamaha Racing-inspired graphics. (Yamaha Motorsports)

450cc four-stroke power. Championship-proven KYB suspension. Smartphone tuning. Race-ready Yamaha DNA. The 2027 YZ450F is built for one purpose—getting to the front. ??????