At a time when other major motorcycle manufacturers were shifting away from making single cylinder, two-stroke dirt bikes in favor of four strokes, Kawasaki continued to make its KDX line of two-stroke dirt bikes. The Japanese manufacturer offered three KDX models in 2005, the 50, the 200, and the 220R, all in Kawasaki’s trademark lime green. Kawasaki introduced its KDX line in 1980 with 175 cc and 250 cc engine sizes. The 175 cc was upgraded to 200 cc in 1983, and Kawasaki dropped the 250 cc model a year later. Kawasaki introduced the 220R in 1997. The KDX 220R has a bigger bore, 69 mm, compared to 66 mm for the KDX 200, giving the engine an extra 18 cc of power. Both the 200 and 220R are agile on the trail and do a good job of keeping up with bigger bikes, such as 250 ccs.