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2005 KX 250-R

With the 4-stroke grabbing all the attention in motocross these days, die-hard 2-stroke lovers have had little to cheer about. Not any more! Because the '05 KX250 gets a new, more powerful engine, an up rated chassis with brilliant handling and a host of other upgrades to keep it at the front of the pack.

The engine is all new and features independently operating KIPS valves, for stronger, more linear power across the rev range. While the cylinder has been re-ported for more power, and redesigned for improved cooling, the transmission offers better shifting. The engine is also lighter, thanks to new crankcases, a lighter KIPS mechanism and many other improvements. As a result of these changes, the engine has improved over-rev characteristics and class-leading low- and mid-range power, all without sacrificing the engine's mighty top-end power.

The race-winning perimeter frame benefits from a slightly steeper rake for responsive cornering performance, a new swing arm, revised linkage ratios for the new Uni-Trak rear suspension, an improved riding position and many other performance-enhancing modifications.

The key features can be summarized as follows:

• Improved Engine Performance – Re-ported cylinder with KIPS valve operation and improved cooling, cylinder mounting angle reduced to allow longer exhaust port, increased primary compression, redesigned reed valve, redesigned expansion chamber, improved over-rev characteristics.
• Brilliant Handling and Improved Riding Position – Steeper steering rake, new Uni-Trak ratios, lighter rims and tires, new seat, and improved riding position are just some of the many chassis upgrades.

KX 250-R SPECIFICATIONS