Dual injectors & Straight Intake
The KX250F fuel injection system features dual injectors – a world's first for a production motocrosser. One injector is positioned downstream of the throttle valve (where injectors are located on standard FI systems), and a second, upstream injector is located close to the airbox.
Power is greater at all rpm, but especially in the high-rpm range. Torque feeling is reminiscent of a carburetted engine. The superb FI response is unchanged. The 2013 model has a straighter intake port for even more power at high rpm.
Works-base piston with bridged-box bottom
A works-base bridged-box bottom piston (used for the first time on a mass-production motocrosser on the 2010 KX250F/KX450F) is just one of many engine features inspired by our factory racers.
The high-performance piston contributes to improved performance at all rpm. A short skirt, reinforced external ribs and the industry's only mass-production use of a bridged-box bottom with internal bracing, result in a lighter, stronger piston.
Dominant race performance
The KX250F's long history of winning continues, with Kawasaki riders showing dominant performance in both AMA Supercross Lites and Motocross Lites competition.
DFI Setting Data Selection
Adjusting engine settings to suit conditions has never been easier than with the new DFI couplers. The plug-and-play system allows riders to quickly and easily access their choice of three maps (standard, hard, soft) provided in the new ECU.
Tuned for race-experienced riders, the KX250F engine's wide powerband focuses on high-rpm performance that extends way into the over-rev.
Its fuel injection system was designed specifically for motocrossers, incorporating a small lightweight ECU and operating without a battery to further eliminate unnecessary weight.
Highly acclaimed for its high output and power delivery, the 2012 KX250F takes MX engine performance to the next level with the world's first dual injection for motocrossers.
The result is 'next level' power across the rev range. For 2013 a new, straight intake port improves intake efficiency for more power at high rpm.
KX FI Calibration Kit
This optional kit is identical to that used by our factory teams. The kit enables expert riders to adjust engine characteristics (by rewriting actual data maps) to suit track conditions and riding styles. A data logger records and analyses riding data for fine-tuning of settings.