STRONGEST 4-STROKE KX250 ON THE RACETRACK
FACTORY-STYLE ENGINE COMPONENTS AND TUNING
Although the 2020 KX250 has already benefited from a significant increase in power thanks to the adoption of finger-follower valve actuation such as the KX450, additional changes for 2021 further increase peak power and allow an even higher rev limit, while significantly increasing low-mid rpm performance.
MORE-RACE-WINNING HIGH-RPM POWER
The new engine boasts a peak power increase of approximately 1.0 kW (1.4 hp) and the rev limit increases by another 350 min-1 to 14,500 min-1. A significantly more robust low-midrange is complemented by a strong high-rpm performance that gives riders an advantage over the straights and, when combined with a higher rev limit, makes it easier to tie corners together for faster lap times.
FACTORY-RACER ENGINE TUNING
Like the KX450, the KX250 features a valve train designed by Kawasaki World Superbike engineers. Finger-follower valve actuation enables higher rev limits and more aggressive cam profiles – both of which contribute to high rpm performance.
Like the KX450, the hydraulic clutch provides a direct feel and light lever action. Less play as the clutch heats up during heavy use results in a more consistent feel. The use of coned-disk springs contributes to a lighter actuation of the clutch when the lever is pulled in and a wider range of grips facilitates control.
ELECTRIC START & BATTERY
Being able to quickly restart the engine during the race can mean the difference between keeping your lead or having to fight your way back through the pack. Electric start makes restarting the engine as easy as pressing a button.Li-ion battery helps keep weight to a minimum.
An evolution of the current design, the new frame offers a better overall rigidity balance. While many parts are common to the KX450 frame, the cast parts (such as the shock tower mount and the engine mount) were designed specifically for the needs of the KX250.
STEERING HEAD & SWINGARM UPDATE
The steering head area with optimized rigidity, the mainframe rails with revised cross-sections, and the revised swing arm bracket line contributes to the overall rigidity balance. KX450 swingarm provides rigidity to match the frame and contributes to increased rear traction. The chassis balance and settings were all set to suit the experienced riders of the race.
STRONG BRAKING PERFORMANCE
The new KX450 front master cylinder adds a high level of the front brake control and feedback. The smaller-diameter rear disk ø240 mm offers optimized performance for the KX250. Both sporty looks and a high-quality appearance contribute to the stylish discs.
Factory-style ø28.6 mm (1-1/8”) Renthal aluminium Fatbar, a popular aftermarket part, is now a standard feature. The thicker handlebar helps reduce vibration and shocks transmitted to the rider, while the new grip position (19 mm lower, 8 mm 10 closer) helps put the rider in a position that makes it easier to weight the front wheel.
RACE READY SUSPENSION
High-performance KYB ø48 mm inverted coil spring fork handles suspension duties up front. Its large-diameter inner tubes enable the use of large ø25 mm damping pistons, providing smooth operation and firm damping.
Complementing the sleek new bodywork of the KX250, factory-style graphics ensure that it is the sharpest looking bike in the paddock and further reflects its highly tuned performance. Colored highlights on suspension adjusters and engine oil cap and generator cover plugs contribute to a distinctive Kawasaki look.
SLIM, ERGONOMIC BODYWORK
The narrow frame and minimal bodywork offer a slim riding position that facilitates control. The low , flat tank / seat design makes it easier to sit further forward, and the long, smooth surfaces make it easier to slide back and forth.
The choice of four handlebar positions and two footpeg positions allows riders to tailor their riding position to suit their body size and preference.