Yamaha YZ250X (2016-2023): A Two-Stroke Enduro Legend Reimagined
Introduction
The Yamaha YZ250X isn’t just a motorcycle—it’s a statement. Designed for riders who demand the raw thrill of a two-stroke engine paired with the precision of modern off-road engineering, this enduro machine has carved its niche as a favorite among trail riders and cross-country racers. From its debut in 2016 through its 2023 iteration, the YZ250X has maintained a cult-like following, blending Yamaha’s legacy of reliability with updates that keep it competitive in the ever-evolving off-road segment. Having spent a day thrashing this bike through rocky singletrack, muddy hill climbs, and open fire roads, I’m here to break down why this blue beast remains a top contender.
Engine Performance: Two-Stroke Simplicity, Modern Refinement
At the heart of the YZ250X lies a 249cc liquid-cooled two-stroke engine, a design that’s increasingly rare in today’s four-stroke-dominated market. But Yamaha’s decision to stick with this configuration pays dividends. The engine’s 66.4 mm bore and 72.0 mm stroke (2.6 x 2.8 inches) deliver a broad powerband, with a focus on low-to-mid-range torque that’s ideal for technical terrain. The Keihin PWK38S carburetor (updated to a Hitachi Astemo®-branded version in 2023) ensures crisp throttle response, while the 9.4:1 compression ratio strikes a balance between tractability and punch.
Riding the YZ250X feels like wrestling a controlled explosion. The initial hit is softer than motocross-focused two-strokes, making it less intimidating on slippery roots or loose gravel. However, once the RPMs climb, the power surges forward with a raspy snarl that’s pure adrenaline. The 5-speed transmission ratios are perfectly spaced for enduro—first gear crawls up near-vertical inclines, while fifth gear lets you stretch its legs on fast logging roads.
Key Takeaway: This isn’t a bike that demands constant clutch work. The engine’s linear delivery lets you focus on picking lines rather than managing wheelspin.
Chassis and Handling: Lightweight Agility Meets Stability
The YZ250X’s aluminum frame is a masterpiece of flex and rigidity. Weighing just 103.9 kg (229 lbs) with fluids, it flicks between trees with the agility of a trials bike yet feels planted at speed. The 1486 mm (58.5-inch) wheelbase and 27.7° rake angle provide stability on high-speed trails, while the slim profile lets you grip the bike with your knees effortlessly.
Dunlop tires—either the Geomax AT81, MX33, or AT81F depending on the year—offer predictable grip across varied terrain. The 21-inch front and 18-inch rear wheel combo strikes a balance between obstacle roll-over ability and rear-wheel control. During my test ride, the bike tackled everything from jagged rock gardens to deep sand without hesitation.
Ground clearance ranges from 325 mm to 361 mm (12.8–14.2 inches) across model years, ensuring skid plates rarely scrape on embedded rocks.
Ergonomics: Tall but Manageable
At 970–975 mm (38.2–38.4 inches), the seat height is undeniably tall, but Yamaha’s narrow frame design helps shorter riders reach the ground. The Team Yamaha Blue plastics are slim at the knees, allowing for easy weight shifts. Standing up on the pegs feels natural, thanks to a handlebar bend that positions your elbows high for control.
The 7.95-liter (2.1-gallon) fuel tank (reduced to 6.8L/1.8 gallons in 2023) is sufficient for 2–3 hours of hard riding. For longer enduro loops, aftermarket tanks are a popular upgrade.
Suspension and Brakes: KYB Excellence
Yamaha’s partnership with KYB shines here. The Speed-Sensitive System (SSS) inverted fork offers 300 mm (11.8 inches) of travel, while the fully adjustable rear shock provides 315 mm (12.4 inches). Both units are plush on small bumps yet resist bottoming on big hits. Dialing in sag took minutes, and the clickers responded predictably to adjustments.
Braking is handled by hydraulic discs—270 mm front (2017+) and 245–240 mm rear. While not as aggressive as Brembo systems, the Nissin calipers provide ample stopping power with a progressive feel that’s ideal for slippery descents.
Competition: How the YZ250X Stacks Up
KTM 250 XC-W
- Engine: Two-stroke, slightly more aggressive power delivery.
- Weight: Similar at 104 kg (229 lbs).
- Suspension: WP XPLOR units are plusher but require more tuning.
- Edge: KTM’s electric starter and hydraulic clutch are premium touches, but Yamaha’s reliability and lower maintenance costs appeal to purists.
Beta 250 RR
- Engine: Oil-injected two-stroke for convenience.
- Weight: 107 kg (236 lbs)—heavier but more planted.
- Suspension: Sachs components lack KYB’s adjustability.
- Edge: Beta’s trail-ready accessories are a plus, but the YZ250X feels livelier.
Husqvarna TE 250i
- Engine: Fuel-injected two-stroke with smoother power.
- Weight: 102 kg (225 lbs) with composite subframe.
- Suspension: WP components comparable to KYB.
- Edge: Husqvarna’s tech is cutting-edge, but Yamaha wins on affordability and aftermarket support.
Maintenance: Keeping Your YZ250X Alive and Thriving
- Top-End Rebuilds: Two-strokes demand piston replacements every 40–60 hours. Consider a forged piston kit from MOTOPARTS.store for durability.
- Air Filter Care: Clean the foam filter after every ride. Our store stocks twin-air filters pre-oiled for quick swaps.
- Chain & Sprockets: The O-ring chain lasts longer with regular lubrication. Upgrade to a DID VT2 chain for reduced stretch.
- Suspension Service: Rebuild KYB forks annually. We offer OEM seal kits and Motul fork oil.
- Exhaust Upgrades: A FMF Gnarly pipe improves low-end torque while protecting the stock header from rocks.
Final Thoughts
The Yamaha YZ250X is a rare breed—a two-stroke that’s as forgiving as it is thrilling. It doesn’t coddle you with electronics or gimmicks; instead, it rewards skill and punishes laziness in equal measure. Whether you’re a seasoned racer or a weekend warrior, this bike’s blend of simplicity, agility, and Yamaha’s bulletproof engineering makes it a timeless choice.
Ready to personalize your YZ250X? Explore MOTOPARTS.store’s curated selection of performance upgrades, maintenance kits, and off-road accessories to make your Yamaha truly yours.
Specifications sheet
| Engine | |
|---|---|
| Stroke: | Two-stroke |
| Fuel system: | Carburetor (Keihin PWK38S) |
| Displacement: | 249 ccm |
| Bore x stroke: | 66.4 x 72.0 mm (2.6 x 2.8 in) |
| Configuration: | Single |
| Cooling system: | Liquid |
| Compression ratio: | 9.4:1 |
| Number of cylinders: | 1 |
| Dimensions | |
|---|---|
| Wheelbase: | 1486 mm (58.5 in) |
| Wet weight: | 103.9 |
| Seat height: | 970–975 mm (38.2–38.4 in) adjustable |
| Overall width: | 826 mm (32.5 in) |
| Overall height: | 1290 mm (50.8 in) |
| Overall length: | 2184 mm (86.0 in) |
| Ground clearance: | 361 mm (14.2 in) |
| Fuel tank capacity: | 7.95 L (2.10 US gal) |
| Drivetrain | |
|---|---|
| Final drive: | chain |
| Chain length: | 118 |
| Transmission: | 5-speed |
| Rear sprocket: | 47 |
| Front sprocket: | 15 |
| Maintainance | |
|---|---|
| Rear tire: | 110/100-18 |
| Engine oil: | 2-stroke premix oil |
| Front tire: | 90/90-21 |
| Break fluid: | DOT 4 |
| Spark plugs: | NGK BR8ES |
| Additional Info | |
|---|---|
| Stock tires: | Dunlop Geomax AT81/MX33 (model year dependent) |
| Color options: | Team Yamaha Blue |
| Factory warranty: | 30 Day Limited Factory Warranty |
| Chassis and Suspension | |
|---|---|
| Frame: | Aluminum |
| Trail: | 122 mm (4.8 in) |
| Rear brakes: | Single 245 mm disc, hydraulic |
| Front brakes: | Single 245 mm disc, hydraulic |
| Rear suspension: | KYB single shock; fully adjustable |
| Front suspension: | KYB Speed-Sensitive System inverted fork; fully adjustable |
| Rake (fork angle): | 27.7° |
| Rear wheel travel: | 315 mm (12.4 in) |
| Front wheel travel: | 300 mm (11.8 in) |
