2025 YAMAHA YFZ 50

Four-wheel fun starts with KFX®. Get the kids outdoors and ready to ride on the KFX®90 ATV line with proportionate power and size for riders ages 10 and older. KFX90 ATVs let kids take on more challenging tracks and bigger adventures with an 89.9cc engine and sporty suspension.

Featuring:

89.9cc 4-Stroke Engine and Automatic Transmission

Electric Start with Keyed Ignition

Adjustable Throttle Limiter and Automatic Continuously Variable Transmission (Cvt) Collar

Additional Vehicle Features:

Sporty front-end styling

Front LED accent lights and LED taillights

Full coverage floorboards with slip-resistant footing

Independent A-arm front suspension and swingarm rear suspension

Top Features:

Engine

Reliable & Accessible

The KFX®90 ATV lets riders ages 10 and older take on tougher tracks. An 89.9cc 4-stroke engine equipped with an electric start for simple and reliable starting produces smooth and predictable power.

Parental controls include a keyed ignition to help address unsupervised use, as well as speed controls with a throttle-limiting screw to restrict throttle movement, and a collar in the automatic Continuously Variable Transmission (CVT) that can be removed to increase speed as the rider gains experience, allowing the KFX®90 to grow with the rider.

Protection

Get A Grip

Full coverage floorboards with slip-resistant footing contribute to increased grip and help young riders control their ATV when riding while in a standing position. Effective mud protection keeps the engine running at a cooler temperature and keeps dirt and debris from building up near the engine.

Suspension

Smooth Out Your Ride

Independent A-arms in the front and swing arm rear suspension soak up bumps for a smooth ride and contribute to sporty handling.

Styling

Ride with Swagger

Front LED accent lights, and LED taillights add to the already race-inspired bodywork. Additionally, a tall design of the front fenders conveys a strong sporty off-road performance look.

Specifications:

Power:

Engine - 4-stroke, single-cylinder, air-cooled

Displacement - 89.9cc

Bore x Stroke - 47.0 x 51.8mm

Compression Ratio - 10.0:1

Fuel System - Keihin PTE16 carburetor

Ignition - Solid state CDI

Transmission - Automatic Continuously Variable Transmission (CVT)

Final Drive - 2WD, chain

Capability

Front Suspension / Wheel Travel - Single A-arm with twin shocks/2.8 in

Rear Suspension / Wheel Travel - Swingarm with single shock/2.9 in

Front Tire - AT 18 x 7-8 tubeless

Rear Tire - AT 18 x 9-8 tubeless

Front Brakes - Dual mechanical drums

Rear Brakes - Hydraulic disc

Ground Clearance - 3.9 in

Starting System - Electric with back-up kick-starter

Fuel Capacity - 1.4 gal

Steering - Conventional tie-rod

Turning Radius - 8.9 ft

Details

Frame Type - Double-cradle, steel

Tread Width - 26.8/26.0 in

Overall Length - 56.1 in

Overall Width - 35.6 in

Overall Height - 36.4 in

Seat Height - 25.6 in

Curb Weight - 269.0 lb*

Wheelbase - 38.0 in

Color Choices - Lime Green, Battle Gray