KX250

STRONGER, FASTER KX250: INCREASED TRACK PERFORMANCE FOR 250 MOTOCROSSER

KX250

In the over 40 years since the brand was launched, the KX design philosophy – to put mid-level to expert riders on the top step of the podium – has remained unchanged. The philosophy has served Kawasaki well: in the extremely competitive 4-stroke 250cc class Kawasaki race machines have helped capture the most AMA Supercross and Motocross titles.

 

After benefitting from major updates in 2020 and 2021, further revisions the resulted in significantly increased performance. Engine updates deliver increased performance at all rpm, while new tyres and revised suspension settings offer improved handling when cornering. The resultant quicker lap times make the KX250 an even more potent track weapon.

  • KX250 : Lime Green (2024)
  • KX250 : Lime Green (2024)
  • KX250 : Lime Green (2024)
  • KX250 : Lime Green (2023)
  • KX250 : Lime Green (2023)
  • KX250 : Lime Green (2023)

COLOR

  • Lime Green (2024)
  • Lime Green (2023)

PRICE (BAHT)

  • 372,800
  • 372,800
  • * Price and promotion are according to the terms and conditions on the day of purchase.

Top Features

Top Features

Increased Engine Performance

Stronger performance across the rev-range translates to quicker lap times and better holeshot performance.

 

Narrower pitch for the intake valves (37 mm >> 35.5 mm) coupled with increased clearance at the valve seats delivers increased cylinder-filling efficiency and improved combustion for increased peak performance. The valves themselves are smaller (ø32 mm >> ø31 mm), which contributes to cylinder-head/valve-seat reliability while enabling the tighter valve pitch. Piston crown revised to match the valve size and pitch changes.

Straightened Intake Flow

Downdraft-style intake duct is straighter, and the upstream injector is repositioned from above to below the duct. These changes further contribute to increased cylinder-filling efficiency, which adds to peak performance.

Racer-Friendly Power

Magneto rotor with an increased moment of inertia (9.5 kg·cm2 >> 10.0 kg·cm2) contributes to racer-friendly power delivery.

 

Revised material for the clutch pushrod (steel >> steel cap + aluminium shaft) results in lighter clutch operation.

 

Racer-Friendly Gearing

Based on feedback from Kawasaki’s factory racing efforts in AMA Supercross, a longer 1st gear makes it easier to use in a greater number of situations. 2nd gear ratio was also fine-tuned to offer a smooth transition from 1st to 3rd gear.

Engine Reliability Updates

Connecting rod big-end bearing crush height was increased, contributing to reliability and durability. Revised main holding circuit relay contributes to general reliability.

Suspension Fine-Tuning

Front and rear suspension setting updates contribute to improved cornering. On corner entry, greater front-end feedback contributes to a more planted feel. Increased ground-holding performance makes it easier to hold a chosen line through the corner. After exiting the corner, revised rear suspension settings contribute to stronger acceleration.

New Tyre Pattern, Larger Rear Tyre

Dunlop MX33 tyres offer increased traction to match the engine’s increased power. (Brazilian-market models use Pirelli Scorpion MX32 tyres, as before.

 

Wider 110/90-19 rear tyre (previously 100/90-19) contributes to increased rear wheel traction as well as a greater planted feeling. (Brazilian-market models use a 100/90-19 rear tyre, as before.

Wide-Style Footpegs

Revised footpeg design is 5 mm wider (front-to-rear) and positioned 3 mm rearward, offering excellent grip, superb feel, and making it easier to weight the pegs.

 

The new design (with aluminium instead of steel brackets) is also lighter. Along with the weight-saving changes to the suspension, they offer 430 g in savings, which help offset the larger (and heavier) rear tyre.

  • Increased Engine Performance

    Stronger performance across the rev-range translates to quicker lap times and better holeshot performance.

     

    Narrower pitch for the intake valves (37 mm >> 35.5 mm) coupled with increased clearance at the valve seats delivers increased cylinder-filling efficiency and improved combustion for increased peak performance. The valves themselves are smaller (ø32 mm >> ø31 mm), which contributes to cylinder-head/valve-seat reliability while enabling the tighter valve pitch. Piston crown revised to match the valve size and pitch changes.

  • Straightened Intake Flow

    Downdraft-style intake duct is straighter, and the upstream injector is repositioned from above to below the duct. These changes further contribute to increased cylinder-filling efficiency, which adds to peak performance.

  • Racer-Friendly Power

    Magneto rotor with an increased moment of inertia (9.5 kg·cm2 >> 10.0 kg·cm2) contributes to racer-friendly power delivery.

     

    Revised material for the clutch pushrod (steel >> steel cap + aluminium shaft) results in lighter clutch operation.

     

    Racer-Friendly Gearing

    Based on feedback from Kawasaki’s factory racing efforts in AMA Supercross, a longer 1st gear makes it easier to use in a greater number of situations. 2nd gear ratio was also fine-tuned to offer a smooth transition from 1st to 3rd gear.

  • Engine Reliability Updates

    Connecting rod big-end bearing crush height was increased, contributing to reliability and durability. Revised main holding circuit relay contributes to general reliability.

  • Suspension Fine-Tuning

    Front and rear suspension setting updates contribute to improved cornering. On corner entry, greater front-end feedback contributes to a more planted feel. Increased ground-holding performance makes it easier to hold a chosen line through the corner. After exiting the corner, revised rear suspension settings contribute to stronger acceleration.

  • New Tyre Pattern, Larger Rear Tyre

    Dunlop MX33 tyres offer increased traction to match the engine’s increased power. (Brazilian-market models use Pirelli Scorpion MX32 tyres, as before.

     

    Wider 110/90-19 rear tyre (previously 100/90-19) contributes to increased rear wheel traction as well as a greater planted feeling. (Brazilian-market models use a 100/90-19 rear tyre, as before.

  • Wide-Style Footpegs

    Revised footpeg design is 5 mm wider (front-to-rear) and positioned 3 mm rearward, offering excellent grip, superb feel, and making it easier to weight the pegs.

     

    The new design (with aluminium instead of steel brackets) is also lighter. Along with the weight-saving changes to the suspension, they offer 430 g in savings, which help offset the larger (and heavier) rear tyre.

Specifications

Specifications

DIMENSIONS
Overall length 2,190 mm
Overall width 820 mm
Overall height 1,270 mm
Wheelbase 1,485 mm
Road clearance 345 mm
Seat height 960 mm
Curb mass 108 kg
Dry mass 102.9 kg
Fuel tank capacity 6.2 litres

PERFORMANCE
Max. power -
Max. Power with Ram Air -
Max. torque -

ENGINE
Type / Valve system 4-stroke Single
Coolant System Liquid-cooled
Bore x Stroke 78.0 x 52.2 mm
Displacement 249 cm3
Compression ratio 14.1:1
Fuel supply Fuel injection (ø44 mm x 1)
Lubrication system Forced Lub. Semi-dry sump
Starting system EL. Starter
Ignition system Digital DC-CDI

DRIVETRAIN
Driving system Chain
Transmission 5-speed, return
Primary reduction ratio 3.350 (67/20)
1st Gear ratios 2.154 (28/13)
2st Gear ratios 1.733 (26/15)
3st Gear ratios 1.438 (23/16)
4st Gear ratios 1.235 (21/17)
5st Gear ratios 1.045 (23/22)
6st Gear ratios -
Final reduction ratio 3.846 (50/13)
Clutch type (Primary) Wet multi-disc, manua

FRAME
Type Tubular, semi-double cradle
Front Suspension ø48 mm inverted telescopic fork with adjustable compression and rebound damping
Rear Suspension New Uni Trak with adjustable dual-range (high/low-speed) compression damping, adjustable rebound damping and adjustable preload
Front Wheel travel 314 mm
Rear Wheel travel 316 mm
Caster (Rake angle) 28.0°
Trail 118 mm
Steering angle (left/right) 42° / 42°
Front Tyre 80/100-21 51M
Rear Tyre 110/90-19 62M
Front Type Brake Single disc
Caliper (Front) Dual-piston
Rear Type Brake Single disc
Caliper (Rear) Single-piston