Motocross is a relentless taskmaster for engineers because what’s factory spec today is tomorrow’s old tech. Accordingly, after a complete revamp for 2017, Kawasaki’s enduring (now in its 15th model year) four-stroke 250 has already been updated for 2018. Improvements to the 249cc DOHC single include new intake-tract dimensions, plus a new camshaft, fuel pump, throttle body for the dual-injector EFI, and exhaust header. In chassis features, the Showa Separate Function Fork (SFF) gets a softer spring with more preload and revised damping settings; the shock shares the latter upgrades as well.
The engine is a tiger on the top-end, and the power curve is well-matched to the five-speed gearbox’s ratios overall; the only niggle here is, in our opinion, that more bottom-end grunt would be useful for driving off berms and out of tight corners. Handling-wise, the KX250F works well with the rider, allowing easy line choices—including quick midcorner corrections—and remaining composed in difficult situations such as braking bumps. A comfortable cockpit with adjustable handlebar and footpeg positions seals the deal.
Likes: Wicked top-end power, excellent handling, adjustable cockpit
Dislikes: Could use more poke at low rpm
Verdict: A welcome mix of poise and potency

/cloudfront-us-east-1.images.arcpublishing.com/octane/ESEQXKLW2BFADFTTIMGUVUQBOY.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/EHHGX7WY6REFLFPN4LWXVC2QP4.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/YNGKWQRUMJEVLL5HTPPAEHIUQA.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/MB5GFVVTBVFY3PFOAQH5CLZTYM.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/R26K447HPJFXNL7HDNAIY4VOI4.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/U3S3JPJT5REW7NTPZMUP2FZY3A.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/WPQ2LXEKPVFZRF2CZLPSDOMVAI.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/BNSDRE4DCJE5ZPOLGPBZPOMZEI.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/GO6FSVIIKNBVPLSIS7IBWE7AEM.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/CS6TMZNTENGKFDW56HSE2HFZ2M.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/FUFID44YDBAM3EHF2AV5LDHLVE.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/QKEXZXUGVFATPE7RAT3HAHDQZ4.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/T7GEMBOUDBHX7EDP2PRQ2J2XME.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/U4CKRUKLKZD43FDSDLZHBL7YVA.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/OFSXJJ5PZFEZ5D5ZPMCFVHJUMA.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/N2JLNLG44VEKBMEPORRDTMX5A4.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/PYWEGG6FHJD6XLPKICS7XHMMZ4.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/XXFQQQ4AYJDCXDGVW3JTHAYONI.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/WMF36OICPZEJDPKABMHQVHXBZ4.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/3DJ46QYFAJA5RIJILQR2XIZXM4.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/4HYMMY6K4JHMNEQ56FXTGAHKG4.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/KUENZXA3RFBIHIDGHEEVH6YNYE.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/UW6THULV65E4TDI4DWLOMDR7LY.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/5S5CDZTZPJBHJBLHENVXEFYKG4.jpg)