2027 Yamaha YZ250F Review

Results don’t lie. The current Yamaha YZ250F is the bike to beat in the 250 class. It’s won 20 combined Supercross and motocross championships since 2014 and has topped our 250cc Shootout multiple times. This year alone, the bLU cRU swept both 250 Supercross titles and captured the 2026 AMA Pro Motocross crown with Cole Davies. Yamaha is introducing an all-new version of the popular YZ250F, and we had the chance to ride it at the ClubMX Training Facility in Chesterfield, South Carolina.

Photography by Trevor Hunter

Why The Change | 2027 Yamaha YZ250F Review

If the bike is so dominant, why does it need to change? Aside from the standard four-year model cycles and the quest for constant innovation, new sound restrictions from the AMA and FIM are affecting new motocross race bikes. For 2027, AMA Pro Racing is implementing a 109-decibel sound rule. If manufacturers want to sell a bike on Friday that can race a Pro National on Saturday morning in stock trim, they must comply with this new rule. Pair that with constant model evolution, and you can see why Yamaha is rolling out an all-new bike.

What’s New | 2027 Yamaha YZ250F Review

Yamaha wants to maintain its current dominance while meeting these new sound regulations. Sounds simple, but you can’t just slap on a new muffler and call it a day. To ensure everything works harmoniously, Yamaha engineers dissected the airbox, engine, header pipe, muffler, chassis and more.

The forward-facing airbox is a signature Yamaha design. This year, the airbox cover has fewer holes, and the air boot features a shorter, funnel-shaped design with an internal resonator. Sound reduction was a major undertaking for this year’s bike, and Yamaha says these changes helped reduce noise by six decibels compared to the previous version.

The cylinder head has been reworked, with new intake and exhaust port shapes and a new finger-follower rocker arm for the intake. The bore and stroke remain unchanged, but the transmission ratios have been revised for broader use across the rev range. A new Nissin hydraulic clutch was added this year, and the motor’s lubrication system now uses a dry-sump layout. The entire electric-start system was also redesigned for quicker starting.

There’s a new resonator on the header pipe, and the muffler is longer and angled down 1.6 degrees.

The entire rear brake system is redesigned for 2027. A smaller disc is paired with a smaller caliper and master cylinder, resulting in a total reduction of nearly half a pound. The brake-pedal tip is also new, with sharper teeth and a replaceable design.

The frame is new. The main downtube has been redesigned for improved stability and bump absorption, and the engine mounts have been reworked to match. Out back, there’s a new rear brake system and a larger rear shock to complement the updated frame. Fork settings have also been updated to match the chassis. The bodywork, seat, frame and shock are the same as those on the YZ450F, which was updated for the 2026 model year.

All told, the 2027 model gained three pounds. One look at the muffler makes it clear where most of that weight comes from. The YZ250F retails for $9099 and is also available dressed up in the Monster Energy Edition for an additional $200.

Ride Time | 2027 Yamaha YZ250F Review

We rode the YZ250F at ClubMX in South Carolina, and the first thing I noticed about the new bike is the updated starting system. Electric-start YZs are notoriously slow, and I’ve been left on the line during dead-engine starts, waiting for the engine to turn over. Not anymore. When cold, you can practically look at the button, and this thing starts right up. While small in terms of overall performance, this is definitely a helpful update for Yamaha owners.

YZs are notoriously loud, and there’s no way around it because you sit on top of the air intake. While the overall engine layout remains the same, the noise level is more bearable. Previously, the bike felt rattly at high rpm. Now the deadened-sound character makes the bike feel tighter and more cohesive. There’s less rattle across the rpm range; it’s most noticeable at high rpm.

Gear ratios feel longer than before, which means less shifting around the track. Second and third gear pull much farther, and you don’t have to short-shift the bike to keep it in the power window. Yamaha also raised the rev-limiter by 700 rpm, which further extends the length and usability of each gear.

Bottom-end power feels ultra-connected from the throttle to the rear wheel and seems slightly improved over the previous model. This bike, however, does its best work in the mid- to top-end range. As mentioned with the longer-pulling gears, the meat of the power lies in that same upper-middle area. Keeping the revs up gives you instant, on-tap power and helps the YZ maintain its high-strung personality. There’s no doubt this is a full-fledged race bike, and it wants to be ridden as such.

The YZ250F again comes standard with Yamaha’s Power Tuner app. We opened it up to give the bike a more aggressive feel on the soft South Carolina soil and uploaded the Free Rev map. This map gives the YZ a faster pick-up from the bottom through the mid and keeps the engine working well toward the red line. The Free Rev map also removes most of the engine braking, which helps free up the motor and chassis. It’s amazing how a slight tweak to the EFI mapping can make a bike feel so different on the track, in this case, lighter and more playful.

Suspension has always been a strong suit for the YZ250F, and this year is no different. The KYB forks offer exceptional comfort and front-end feel. From small bumps to big, flat landings, everything is absorbed in stride, furthering the “ease of use” theme for this bike. I softened the forks two clicks to help get more weight on the front wheel and found this helpful when placing the front tire into long, sweeping ruts.

As for the shock, I made no changes. It worked very well right out of the crate, and when running 105mm of sag, I found the bike felt balanced all around the track. Both the fork and shock now offer finger adjusters for quick compression tweaks.

The overall chassis feels more stable than before. The 2024 and newer models made strides in feeling narrower and in turning ability, but they gave up some of the stability of the 2023 and earlier versions. The current updated frame helps blend those two together, just as it did with the 2026 YZ450F. Now you can slice through a tight rut without sacrificing high-speed stability down a long straightaway. I could feel the stable character in the faster sections of ClubMX’s outdoor track, and it didn’t give up anything when we switched to the ultra-tight S-turns on their unforgiving sand track.

VIDEO | 2027 YZ250F First Look + ClubMX Tour

Summary | 2027 Yamaha YZ250F Review

The new YZ250F feels improved in nearly every way. However, there are still two things that irk me while riding it. First are the footpegs. With the current shape, I ended up standing on the mount just as much as on the actual peg. You have to train yourself to keep your feet out to avoid the mount and bite the real platform. Second is the seat shape. The cover itself is good, but the rounded shape of the seat just doesn’t jive with me. Plus, the foam feels harder—too hard—than on other bikes. Luckily, there are easy fixes out there for both issues.

Yamaha’s done its best to maintain, and even exceed, the YZ250F’s current performance while meeting new, quieter sound standards. Having not yet had the chance to ride the 2027 YZ250F back-to-back with the 2026, it’s hard to tell what the real the differences are or how much they affect the new model. However, Yamaha’s main objective seems to be met by producing a significantly quieter YZ250F without any performance loss. It’s difficult to imagine the YZ250F being knocked off the top step of the 250 class in the 2027 model year, since it feels as good as it’s ever been, if not a little better.CN

VIDEO | Why’d They Change The ’27 YZ250F?!

2027 Yamaha YZ250F Specifications

Click here to read the 2027 Yamaha YZ250F Review in the Cycle News Digital Edition Magazine.