2006 Kawasaki Ninja 250R

. As the marque's entry-level sport bike, the motorcycle has undergone few changes throughout its quarter-century lifetime, having received only three substantial redesigns.

There were both cosmetic changes and changes in engine tuning. While the bore and stroke, and other major engine components, were unchanged, minor tuning adjustments were made.

. This motorcycle has parts in common with the -F model, though it shares the same engine, albeit with different casings.

The bike has been marketed as the Ninja 250R in all markets. It is also referred to by its platform designation, EX250, to which a generational suffix is attached. Kawasaki gave the EX250 its most extensive redesign in twenty years. The EX250-J model is known as the Ninja 250R worldwide, regardless of market.