Used Motocross Buyer’s Guide – Yamaha YZ250F Review (2015–2020)

Searching for a reliable 250cc motocross bike that pulls hard and starts every time? The Yamaha YZ250F from 2015–2020 has built a rock-solid reputation as one of the most dependable four-strokes on the track. Known for its torque-rich engine, bulletproof build, and standout suspension, it’s the bike that keeps showing up in shootouts—and keeps winning long after the gate drops. In this guide, we break down how it rides, key updates by year, pros and cons, and what to look for when buying a used YZ250F in the UK.

Overview & first impressions

If you had to pick one 250 four-stroke to ride every weekend without worry, the YZ250F would probably be it. Yamaha’s reversed engine layout (intake at the front, exhaust out the back) gives it a distinctive look and a feel that’s instantly responsive.

From 2015 through 2020, the YZ250F evolved gradually rather than radically—refining an already proven package. It’s comfortable, torquey, and planted. Riders love that it feels strong in almost any gear and doesn’t punish mistakes.

Two main phases define this era:

  • 2015–2018: Kickstart models with legendary KYB SSS suspension and broad, torquey power.

  • 2019–2020: Full redesign with electric start, updated chassis, new engine head, and smartphone tuning via Yamaha’s Power Tuner app.

The overall vibe? A bike that makes you faster without making you work harder.

Verdict box

Pros:

  • Strong, tractable engine with plenty of low-end and midrange torque

  • Industry-leading KYB SSS suspension—plush yet controlled

  • Excellent reliability record and long service life

  • 2019+ electric start and smartphone tuning for easy mapping

  • Stable, confidence-inspiring chassis

Cons:

  • Slightly heavier feel than KTM or Honda equivalents

  • Wider cockpit around the airbox area

  • Air filter access requires care—easy to drop dirt in the intake

  • Kickstart only until 2019

Verdict:
The YZ250F is the all-rounder king of the 250 class. Smooth torque, strong suspension, and bulletproof reliability make it ideal for everyone from club racers to weekend warriors.

Model-specific FAQ

Which years have electric start?
Electric start arrives in 2019, along with the Power Tuner smartphone app and new frame.

Does it still use the reverse engine layout?
Yes, all YZ250Fs from 2014 onward use Yamaha’s rearward-slanted “reverse” engine for better mass centralisation and throttle response.

Is it beginner-friendly?
Absolutely. The broad powerband and forgiving suspension make it one of the easiest 250Fs to learn on and progress with.

Any weak points?
Mostly just maintenance-related. Keep the airbox clean and change oil regularly—otherwise, it’s a tank.

Is it worth paying more for 2019+ models?
Yes if you value e-start convenience and app tuning. If not, a well-kept 2016–2018 model rides nearly as well and costs less.

Strengths, weaknesses & buying second hand advice

Engine & performance

The YZ250F’s single biggest strength is its broad, usable power.
It delivers torque from the bottom up—pulling hard off corners and keeping traction even when conditions get slick.

  • 2015–2018: Smooth yet punchy delivery; loads of usable midrange; easy to short-shift and still drive forward.

  • 2019–2020: Revised cylinder head and intake give more top-end, while still keeping that signature Yamaha grunt.

The engine character suits all rider levels. You can lug it like a 450 in tight turns or scream it down a straight—it’s happy both ways. On UK tracks, where traction and corner exits matter more than sheer top speed, this engine’s flexible torque curve is a big advantage.

Chassis, suspension & handling

If you’ve ever heard “KYB SSS” spoken with reverence—it’s because Yamaha nailed suspension setup.

The Speed-Sensitive System (SSS) fork and shock combo is the gold standard for MX suspension: plush on chop, firm on landings, and remarkably consistent. Most riders never feel the need to revalve or modify it.

The chassis itself feels balanced and predictable—more planted than twitchy. It’s not as razor-sharp turning as a Suzuki RM-Z250, but that stability pays off when the track gets rough.

The 2019 frame update made it slightly stiffer and narrower between the legs, improving cornering precision while maintaining that trademark Yamaha stability.

Maintenance & reliability

Yamahas have one of the best reliability records in motocross, period. Owners report hundreds of hours with only routine servicing. Still, there are a few points to watch on used bikes:

  • Air filter: Because it sits on top of the throttle body, you must be meticulous when cleaning. Always block the intake when swapping filters.

  • Valve checks: Infrequent, but worth doing at ~40–50 hours for peace of mind.

  • Cam chain: Replace preventatively around 80–100 hours if raced regularly.

  • Starter system (2019+): Reliable overall—just check battery condition and starter motor health if it’s been sitting.

  • Transmission: Smooth shifting is normal. Any gear popping under load is a red flag.

Keep oil and filters fresh every 5–10 hours and this engine will outlast most rivals.

Used-buying tips by year

  • 2015–2016: Early reverse-engine refinements—strong motors. Check frame welds and airbox for dirt ingress.

  • 2017–2018: Slight mapping tweaks; generally bulletproof; most plentiful on the used market.

  • 2019–2020: Electric start and Power Tuner app. Make sure electronics work, battery’s healthy, and no bent radiator tabs (common from tip-overs).

Across all years, look for smooth starting, crisp throttle response, clean airbox, dry forks, and quiet valve operation.

The Yamaha YZ250F (2015–2020) is the definition of a trustworthy four-stroke. It’s got torque where you need it, suspension that flatters every rider, and reliability proven on tracks across the UK. Whether you’re chasing local podiums or just want a fast, forgiving bike that starts first time every time, the YZ250F is the one to beat in the 250cc class. Clean examples hold value well and deliver years of effortless riding.