In the MXGP TOP, in the AMA Pro Motocross racing series FLOP? Why is that so and can you compare the factory bikes in MXGP with the factory bikes in the USA at all. Clearly a resounding NO. Why? In MXGP, pure prototypes are used in principle. This means that everything is SPECIAL and has nothing to do with the series, even if proven MXGP modifications will certainly find their way into the production models at some point in the following years. The situation is completely different in the USA, because there, according to the latest information, at least 400 production vehicles must be available for the public to buy in the USA, only then are they allowed to compete in the AMA Pro Motocross, which would be an impossible undertaking with thoroughbred factory bikes from MXGP. This is to prevent only the factory teams with factory bikes from competing and the private riders from having no chance.
That’s why the 450cc success in the USA doesn’t really seem to be feasible for the Greens at the moment, while top placement is no problem in MXGP. Neither Chase Sexton nor Jorge Prado was able to achieve consistent success with the green 450. The latter is currently always in the top 5 on his KTM, after he didn’t do anything on GREEN. For example, according to the regulations, the frame and swingarm of the US boys must correspond to the production model, which is not the case with the MXGP boys. This means that the problem of the production model will most likely and currently only come into play in the USA, which means that one can now hopefully expect appropriate adjustments for the 2027 model series. Of course, no one knows 100 percent whether this US problem and the conclusion drawn from it can be transferred 1:1 to the production models. What factors are actually responsible for Prado and Sexton’s difficulties, we will most likely not know.
Back on the European continent, the Greens are definitely on the golden road with their 2025 MXGP world title by Frenchman Romain Febvre. After all, they currently occupy P3 in the 2026 overall standings behind Coenen and Herlings. But now finally to the new 2027 models!
According to the manufacturer, both the KX250F and the KX450F have been extensively redesigned.
KX450F updates 2027
- More controllable
- Increased traction
- More stable at higher speeds
- All-new frame and swingarm (The US conclusion shouldn’t be so wrong after all)
- Longer wheelbase
- Revised intake and exhaust systems
- Optimized fuel injection: More aggressive and direct feel
- More pressure from the rev basement
- Increased mid- and high-end performance
- Launch control by Speed limiter function extended
- New Brembo brakes with steel braided lines
- Slimmer bodywork
KX250F Updates 2027
- Optimized combustion chamber shape in the cylinder
- Extended exhaust pipe
- More compact muffler
- Increased power over the entire rev range: + 0.68 hp
- Torque increase: + 0.3 Nm.
- New RCD settings for a more linear throttle response
- Hydraulic clutch with increased oil capacity and increased spring preload (+15%)
- New designed front fender with number plate
- Newly routed coolant hoses and brake lines
- Adjuster modified on fork and shock absorber
In addition to the classic motocross models, Kawasaki offering the cross-country models KX250FX and 450FX , which are equipped with a modified suspension set-up, sealed drive chain, a side stand and a power supply at the rear for a rear light that can be retrofitted. The KX450FX is also equipped with handguards, while the KX250FX has extra protection on the rear brake disc.
Source / Pictures: Kawasaki Europe & US
