KX250

LIGHTER, FASTER 250cc MOTOCROSSER

KX250

The KX design philosophy – to put mid-level to expert riders on the top step of the podium – has not changed since the brand was launched over 40 years ago. The KX250F has a history of winning: in the extremely competitive 4-stroke 250cc class it is the racer with the most AMA Supercross and Motocross titles. Adding to its highly acclaimed engine and chassis performance, numerous industry firsts and advanced technology, the 2017 model offers a more powerful engine, a significantly lighter chassis, and slimmer ergonomics, making the new model the fastest KX250F yet. In fact, the new model gets around the track 1.6 seconds quicker* than its predecessor.

  • KX 250 : Lime Green
  • KX 250 : Lime Green
  • KX 250 : Lime Green

COLOR

  • Lime Green

Price (Baht)

  • 335,000

Top Features

ENGINE

Tuned to best suit race-experienced riders, the 249 cm3 liquid-cooled, 4-stroke Single’s wide powerband focuses on high-rpm performance and extends way into the over-rev. Highly acclaimed for its high output and smooth power delivery, the 2017 model KX250F backs up its dual-injected power and race-inspired tuning and parts (like the high-performance bridged-box bottom piston) with downdraft-style intake routing and reduced mechanical loss (care of an offset cylinder and plateau honing, among other tweaks), resulting in a stronger lower end as well as a 1 kW increase in maximum engine output. As part of the development goal to become the lightest motocrosser in its class, changes to the engine group result in 0.8 kg in weight savings. Finally, a new accessory KX FI Controller enables map calibration without a PC.

POWERFUL

more upright engine orientation (14o forward >> 7o forward) and a repositioned intake duct allow an even straighter approach for intake air. The downdraft-style intake routing increases the intake air’s approach angle into the cylinder from 16.8o to 30o, improving cylinder-filling efficiency and contributing to increased engine power. Cylinder is offset 3 mm (forward), reducing mechanical loss, which also contributes to the increased engine performance. Plateau honing on the cylinder bore results in a smooth surface with good oil-retention. The smooth surface helps reduce mechanical loss, contributing to the increased engine power.

Frame

Revised for rigidity, the KX250F’s new frame features a slimmer design and lighter overall weight. Previously an extruded part, the redesigned down tube is now a combination forged/cast piece (front part is forged; rear part is cast). The increased rigidity of the new piece, along with a revised head pipe and brace tubes, contributes to greater front-end feel. Width across the main frames is approximately 6 mm slimmer. This facilitates position changes, making it easier for riders to slide forward and backward. The new frame weighs approximately 90 g less than the previous unit. Swingarm from the KX450F offers revised rigidity. The cast front portion is taller with thinner walls, and the wall thickness of the spars was idealised, with thinner side walls and thicker top/bottom walls. The new construction saves approximately 190 g.

Suspension

The KX250F was the first mass-production motocrosser to fea­ture Showa’s Separate Function front Fork (SFF), which separates damping and shock absorption duties:

- Left fork tube: damping assembly

- Right fork tube: spring

The configuration offers both smooth action and firm damping per­formance – a combination difficult to achieve with a conventional fork. With only one spring, the friction generated between the spring(s) and fork inner tube(s) is greatly reduced (approximately 25% less), resulting in extremely smooth action throughout the fork stroke.

Factory styling

Matching the KX250F’s lighter weight, all-new KX450F-inspired minimalist bodywork makes the bike look more compact. Its shroud, fender and number plate designs ensure it is the sharpest looking bike in the paddock. Factory-style graphics further reflect the KX250F’s highly tuned performance, while new in-mould graphics give the design high durability. Green highlights on the suspension adjusters and engine oil cap and generator cover plugs contribute to a distinctive Kawasaki look. Aggressive design of the new front fender adds to the racy looks and saves 50 g in weight. The rear fender’s sharp design contributes a further 70 g in weight savings. Green finish on the oil cap and the two plugs on the generator cover further contribute to factory looks.

  • ENGINE

    Tuned to best suit race-experienced riders, the 249 cm3 liquid-cooled, 4-stroke Single’s wide powerband focuses on high-rpm performance and extends way into the over-rev. Highly acclaimed for its high output and smooth power delivery, the 2017 model KX250F backs up its dual-injected power and race-inspired tuning and parts (like the high-performance bridged-box bottom piston) with downdraft-style intake routing and reduced mechanical loss (care of an offset cylinder and plateau honing, among other tweaks), resulting in a stronger lower end as well as a 1 kW increase in maximum engine output. As part of the development goal to become the lightest motocrosser in its class, changes to the engine group result in 0.8 kg in weight savings. Finally, a new accessory KX FI Controller enables map calibration without a PC.

  • POWERFUL

    more upright engine orientation (14o forward >> 7o forward) and a repositioned intake duct allow an even straighter approach for intake air. The downdraft-style intake routing increases the intake air’s approach angle into the cylinder from 16.8o to 30o, improving cylinder-filling efficiency and contributing to increased engine power. Cylinder is offset 3 mm (forward), reducing mechanical loss, which also contributes to the increased engine performance. Plateau honing on the cylinder bore results in a smooth surface with good oil-retention. The smooth surface helps reduce mechanical loss, contributing to the increased engine power.

  • Frame

    Revised for rigidity, the KX250F’s new frame features a slimmer design and lighter overall weight. Previously an extruded part, the redesigned down tube is now a combination forged/cast piece (front part is forged; rear part is cast). The increased rigidity of the new piece, along with a revised head pipe and brace tubes, contributes to greater front-end feel. Width across the main frames is approximately 6 mm slimmer. This facilitates position changes, making it easier for riders to slide forward and backward. The new frame weighs approximately 90 g less than the previous unit. Swingarm from the KX450F offers revised rigidity. The cast front portion is taller with thinner walls, and the wall thickness of the spars was idealised, with thinner side walls and thicker top/bottom walls. The new construction saves approximately 190 g.

  • Suspension

    The KX250F was the first mass-production motocrosser to fea­ture Showa’s Separate Function front Fork (SFF), which separates damping and shock absorption duties:

    - Left fork tube: damping assembly

    - Right fork tube: spring

    The configuration offers both smooth action and firm damping per­formance – a combination difficult to achieve with a conventional fork. With only one spring, the friction generated between the spring(s) and fork inner tube(s) is greatly reduced (approximately 25% less), resulting in extremely smooth action throughout the fork stroke.

  • Factory styling

    Matching the KX250F’s lighter weight, all-new KX450F-inspired minimalist bodywork makes the bike look more compact. Its shroud, fender and number plate designs ensure it is the sharpest looking bike in the paddock. Factory-style graphics further reflect the KX250F’s highly tuned performance, while new in-mould graphics give the design high durability. Green highlights on the suspension adjusters and engine oil cap and generator cover plugs contribute to a distinctive Kawasaki look. Aggressive design of the new front fender adds to the racy looks and saves 50 g in weight. The rear fender’s sharp design contributes a further 70 g in weight savings. Green finish on the oil cap and the two plugs on the generator cover further contribute to factory looks.

Specifications