iv'e got an 01 ex250 and just picked up another, an 05. both bikes look identical except the 01 has a 14k red line and the 05 has a 12k red line. is there a thread giving the specs for the different years. guess i have a jones for 250's, my last bike was a wr250x, loads of fun.
Kawasaki has actually changed the redline of the Ninja 250 over the production years. It's one of several things which has changed.
One of the reasons for the rev limiter cutoff change, is that Kawasaki has discovered that at the upper limits of the RPM range, the lubrication system may not be able to supply enough oil to some parts of the engine. Also The accepted point at which power ceases to increase is about 12,500 rpm.