2025 Yamaha YZ125X

Lightweight off-road Pro-Am specialist.

Yamaha’s YZ125X gets a sporty new look and toolless fork compression adjust knobs for 2025.Yamaha

Overview

The YZ125X is in what you could call a rare class. The eighth-liter two-stroke powerplant is the smallest displacement among the full-size bikes, though it’s not necessarily a beginner bike. This high-strung competition bike is built for racing, and you’ll often find young motocrossers and off-road racers cutting their teeth in the amateur ranks aboard the YZ125X. You’ll find it featured in the Pro-Am classes of national championships such as the Grand National Cross Country Series (GNCC) and the World Off Road Championship Series (WORCS).

Closely based on its YZ125 motocross sibling, the YZ125X shares a chassis, featuring the same aluminum frame and KYB suspension, although the X receives softer suspension tuned for off-road conditions. It also features an 18-inch rear wheel, kickstand, larger rear sprocket, sealed O-ring chain, and power tuned to deliver a wider range..

New for 2025 the Yamaha YZ125X receives only minor upgrades including toolless fork compression adjust knobs for easy on-the-fly suspension adjustments, a water-resistant PVC handlebar pad, and some fresh graphics.

Yamaha’s YZ125X is a Pro-Am specialist you’ll find in many off-road national championships such as WORCS and GNCC.Yamaha

Pricing and Variants

The 2025 Yamaha YZ125X is available in Yamaha blue for $7199.

Competition

News and Reviews

2025 Yamaha YZ125X Claimed Specs

MSRP: $7199
Engine: Liquid-cooled, 2-stroke single-cylinder
Displacement: 125cc
Bore x Stroke: 54.0 x 54.5mm
Compression Ratio: 7.8–10.2:1
Transmission/Final Drive: 6-speed/chain
Fuel System: Hitachi Astemo Keihin PWK38S carburetor
Clutch: Wet, multiplate
Frame: Aluminum frame
Front Suspension: 48mm fully adjustable KYB SSS inverted telescopic fork; 11.8 in. travel
Rear Suspension: Link mounted, fully adjustable KYB single shock; 12.4 in. travel
Front Brake: 270mm disc, hydraulic
Rear Brake: 240mm disc, hydraulic
Wheels, Front/Rear: Spoked; 21 in./18 in.
Tires, Front/Rear: Dunlop Geomax MX33; 80/100-21 / 110/100-18
Rake/Trail: 26.4°/4.4 in.
Wheelbase: 57.3 in.
Ground Clearance: 14.0 in.
Seat Height: 38.2 in.
Fuel Capacity: 1.8 gal.
Wet Weight: 212 lb.
Contact: yamahamotorsports.com