Yamaha WR 125 X (2009-2017) Review: The Supermoto That Thinks It’s a Contender

Introduction

The Yamaha WR 125 X isn’t just a motorcycle—it’s a statement. Produced from 2009 to 2017, this Supermoto masquerades as a lightweight commuter while packing the DNA of Yamaha’s off-road champions. With its aggressive styling, punchy 125cc engine, and dirt-ready suspension, the WR 125 X is a paradox: a beginner-friendly machine that dares you to push its limits. After spending a week threading it through city traffic, carving backroads, and even tackling gravel paths, here’s why this pocket-sized Yamaha deserves a spot in your garage.

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Design & First Impressions

The WR 125 X doesn’t shy away from attention. With its angular bodywork, high-mounted fender, and knuckle guards, it looks like it rolled straight out of a motocross rally. The steel double-cradle frame gives it a burly stance, while the 17-inch wheels wrapped in 110/70 (front) and 140/70 (rear) tires scream Supermoto agility.

Key Highlights:
- Seat Height: At 920 mm (36.2 in), it’s tall—perfect for riders wanting that "big bike" feel, though shorter riders might tip-toe at stoplights.
- Weight: 137 kg (302 lbs) wet. Light enough to flick around, heavy enough to feel planted.
- Color Options: Racing Blue, Sports White, and Yamaha Black—all muted enough to avoid looking toy-like.

The LCD dashboard is minimalist but functional, showing speed, fuel level, and dual trip meters. The real standout? The racer-style footpegs and frame protectors—subtle nods to Yamaha’s MX heritage.

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Performance: Small Engine, Big Personality

Powered by a 124.7cc liquid-cooled, fuel-injected single-cylinder engine, the WR 125 X churns out 15 hp @ 9,000 rpm and 12.2 Nm (9.0 lb-ft) @ 6,000 rpm. On paper, those numbers seem modest. On the road? It’s a riot.

Throttle Response: The fuel injection delivers crisp acceleration, with no carbureted lag. The engine loves to rev, and the 6-speed gearbox (a rarity in 125cc bikes) keeps it singing happily at highway speeds. Cruising at 90 km/h (56 mph) is stress-free, though overtaking requires planning.

Fuel Efficiency: Expect ~40 km/L (94 mpg) with gentle riding. The 8.5L (2.2 gal) tank translates to a 340 km (211 mi) range—ideal for day trips.

Where It Shines:
- City Riding: Filtering through traffic is effortless. The upright riding position gives great visibility.
- Twisties: The 140-section rear tire grips like a leech. Lean it hard, and the suspension soaks up mid-corner bumps.
- Light Off-Road: The 255 mm (10 in) ground clearance and long-travel suspension (210 mm front / 230 mm rear) handle gravel and dirt trails with ease.

Weak Spot: The engine vibrates noticeably above 8,000 rpm. Invest in padded grips if you plan long hauls.

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Handling & Ride Comfort

The WR 125 X’s chassis is its secret weapon. The 25° rake and 79 mm (3.1 in) trail strike a balance between quick steering and stability.

Suspension:
- Front: 41 mm telescopic forks with 210 mm (8.3 in) travel. Firm enough for aggressive cornering, plush enough for potholes.
- Rear: Link-type monoshock with 230 mm (9.1 in) travel. Preload adjustment lets you tailor it for solo or two-up riding.

Brakes:
- Front: 298 mm disc with a 2-piston caliper. Bite is strong but progressive—no wrist-snapping surprises.
- Rear: 220 mm disc. Adequate for slowing down, but rely on the front for hard stops.

Ergonomics: The seat is thinly padded—fine for an hour, punishing after two. An aftermarket gel seat is a wise upgrade.

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Competition: How Does It Stack Up?

The WR 125 X battled in a niche segment. Here’s how it compares:

1. Aprilia SX 125

• Pros: Sharper styling, slightly quicker acceleration.
• Cons: Higher maintenance costs, reliability issues.
• Verdict: The Aprilia feels sportier but less durable.

2. Husqvarna SMS 125

• Pros: Lighter (129 kg), more aggressive off-road focus.
• Cons: Cramped ergonomics, harsh seat.
• Verdict: Better for dirt, worse for daily commuting.

3. KTM 125 Duke

• Pros: 15 hp with a smoother powerband, premium components.
• Cons: Pricier, higher insurance costs.
• Verdict: The Duke is a better road bike; the WR is more versatile.

4. Honda CRF150L

• Pros: Bulletproof reliability, taller suspension.
• Cons: Heavier, less road-focused.
• Verdict: Choose the Honda for trails, the Yamaha for mixed use.

Yamaha’s Edge: Lower ownership costs, Yamaha’s dealer network, and that indestructible engine.

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Maintenance: Keeping the WR 125 X Alive

Yamahas are built to last, but neglect this bike, and it’ll bite back. Here’s what to watch:

1. Oil Changes

• Interval: Every 5,000 km (3,100 mi).
• Specs: 1.0L of 10W-40 (with filter). Use Yamalube or equivalent.

2. Valve Adjustments

• Interval: Every 10,000 km (6,200 mi).
• Specs: Intake: 0.10–0.14 mm (0.004–0.006 in), Exhaust: 0.20–0.24 mm (0.008–0.009 in).

3. Chain Care

• Tension: 45–55 mm (1.8–2.2 in) slack.
• Lubricant: Use a O-ring-safe chain lube every 500 km (310 mi).

4. Cooling System

• Fluid: Replace coolant every 2 years or 20,000 km (12,400 mi).

5. Brakes

• Pads: Swap when worn to 1 mm. Consider sintered pads for aggressive riding.
• Fluid: DOT 4, changed every 2 years.

Pro Tip: The fuel injector is reliable, but adding a fuel stabilizer during storage prevents gumming.

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Conclusion: Who Should Buy It?

The Yamaha WR 125 X is a Swiss Army knife for riders who want one bike to do it all. It’s ideal for:
- New Riders: Forgiving power, lightweight, and manageable size.
- Urban Commuters: Nimble in traffic, cheap to run.
- Adventure Curious: Capable enough for fire roads and camping trips.

Yes, the seat is hard, the vibrations get old, and it’s not a highway star. But as a jack-of-all-trades, few 125cc bikes match its charisma. Pair it with a set of knobby tires or a taller windscreen, and it’ll transform to suit your needs—proof that Yamaha’s "WR" badge isn’t just for show.

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Ready to personalize your WR 125 X? Explore our catalog of aftermarket parts at MOTOPARTS.store—from performance exhausts to ergonomic upgrades, we’ve got what you need to make this Yamaha truly yours.

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Specifications sheet

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