Have a 2012 with 21,000 miles. The transmission has always done funny things like miss shifts but they seemed to go away after about 10,000 miles. Back in October I could feel the shift lever bouncing up and down about a half an inch when in the first three gears. It almost felt like there was too much slack in the chain but that was not the issue. I keep a tight maintenance schedule and havent skipped anything. I let the dealership take a look. The mechanic rode it and agreed that it was not normal so in it went. He was unable to locate any one specific problem and requested a new trnsmission set from Kawasaki since I still have it under warranty. It is now 2015 and I still don't have my bike. Kawasaki refuses to replace anything unless the mecahnic can isolate the exact piece causing the problem. Two mecahnics have checked the tolerances and found them to be good with no observable damaged parts. Has anyone else had a similar issue and if so, what part(s) caused the problem. Thanks.