Kawasaki KX250F Review (2015–2020)
Looking for a fast, forgiving 250 four-stroke that’s easy to tune and built to race? The Kawasaki KX250F (later simply KX250) from 2015–2020 is a proven contender with a lively engine, stable chassis, and plenty of adjustability for riders. Over this six-year span, Kawasaki evolved the KX250F from a raw, hard-hitting machine into a refined, race-ready package—topping it off with electric start in 2020. Here’s how it rides, what changed, and what to check before buying a used KX250F.
Overview & first impressions
If the Yamaha YZ250F is the safe choice and the KTM 250 SX-F the racer’s weapon, the Kawasaki KX250F sits comfortably in the middle. It’s got a snappy, free-revving engine, predictable handling, and an adjustable cockpit that suits a wide range of riders.
On the track, the KX250F feels agile but planted—easy to flick through ruts, yet steady over braking bumps. Its ergonomics are among the best in the class, thanks to adjustable bar and footpeg positions that let you fine-tune fit.
Kawasaki refined the bike steadily through these years:
2015–2016: Classic dual-injector engine, known for explosive midrange and throttle response.
2017–2018: Major redesign—lighter frame, new engine with single injector for smoother power, improved chassis balance.
2020: Full overhaul with electric start, new DOHC engine with finger-follower valve train, and a sharper overall package.
Every version delivers a fun, eager ride that rewards committed riders but remains accessible for intermediates.
Verdict box
Pros:
Strong midrange power and responsive throttle
Balanced chassis—stable yet quick to turn
Adjustable bars and footpegs fit all rider sizes
Launch Control and easy map swapping (plug-in couplers)
2020 adds electric start and new engine tech
Cons:
Kickstart only until 2020
Some years lost low-end torque when tuning for revs
Slightly louder stock exhaust note
2017–2018 models need regular valve checks if ridden hard
Verdict:
The KX250F is a rider’s bike—fast, predictable, and confidence-inspiring. It may lack the polish of a KTM, but it delivers serious pace, proven reliability, and solid value for UK riders shopping used.
FAQ
When did it gain electric start?
2020, along with a full redesign and DOHC finger-follower head.
Which years used dual fuel injectors?
2011–2016. From 2017, Kawasaki dropped to a single injector for weight savings.
Does the KX250F suit beginners?
Yes—its stable chassis and linear throttle make it manageable. It’s quick but not intimidating.
What’s Launch Control?
A handlebar button that retards ignition in first and second gear for smoother starts off the gate—standard on all 2015–2020 models.
Any known reliability issues?
Only from neglect. Check valve clearances, cam-chain tensioner, and air filter sealing. Engines last well if serviced every 5–10 hours of ride time.
Strengths, weaknesses & used-buying advice
Engine & performance
The KX250F’s motor character is what makes it so addictive.
2015–2016: The legendary dual-injector setup gives instant throttle pickup and a thrilling midrange hit. Perfect for explosive drive out of corners.
2017–2018: New head and lighter chassis—power delivery is smoother but lost a bit of low-end snap. Still quick, just needs more revs.
2020: Full overhaul—finger-follower DOHC design lets it rev higher and cleaner, matching Euro bikes for top-end pace, plus electric start for convenience.
The engine feels snappy but controllable, making the KX250F ideal for riders who like to attack the track rather than short-shift around it.
Chassis, suspension & handling
The KX’s frame geometry blends agility and composure. It tracks straight through rough stuff yet turns willingly with a little rider input.
Forks: Showa SFF (Separate Function Fork) throughout this period—coil-spring design with preload adjuster. Not as trendy as air forks, but consistent and easy to maintain.
Shock: Linkage type with balanced damping that handles hard landings well.
The adjustable ergonomics are a real highlight—four bar positions and two footpeg heights let you tailor the bike to your size and style. Taller riders in particular appreciate the flexibility.
In feel, the KX isn’t as twitchy as a Suzuki, nor as razor-sharp as a KTM, but sits right in that sweet spot between stable and responsive.
Maintenance & reliability
Kawasaki 250Fs are high-performance engines that reward regular care. Follow the basics and they’re as durable as any in the class:
Oil & filter: Every 5–8 hours of hard riding.
Valves: Check around 30–40 hours; adjust as needed.
Cam chain: Listen for noise at idle—replace every 60–80 hours to be safe.
Throttle response: Dual-injector bikes should pull cleanly to redline; hesitation can mean dirty injectors.
Linkage & swingarm: Grease regularly—many neglect this.
Radiators: Check for bends or leaks (common from tip-overs).
Parts availability in the UK is excellent with Team Green support and a big aftermarket mean you’ll find everything from OEM valves to Pro Circuit exhausts with ease.
Used-buying tips by year
2015–2016: Dual injectors = punchy power. Check injector health and signs of hard racing (exhaust wear, clutch).
2017–2018: Lighter, smoother model. Verify valves were serviced—some needed early adjustment.
2020: Electric start and new engine. Ensure starter, battery, and electrical connectors are all sound; ask about ECU updates.
As with all MX bikes: confirm easy hot and cold starting, smooth shifting, tight bearings, and clean airbox. A tidy KX with service logs will outlast a newer neglected rival.
The Kawasaki KX250F (2015–2020) offers the perfect mix of punch, poise, and progression. Earlier models deliver explosive midrange with their dual-injector powerplants, while the 2020 KX250 adds electric start and modern rev-happy refinement. Its balanced chassis, adjustable ergonomics, and predictable handling make it a brilliant choice for riders stepping up their motocross game. Tough, fast, and often undervalued—this Green Machine remains one of the smartest buys in the used 250cc class.