I have a 2007 kawasaki ultra lx. I was recently at lake and ran fine for an hr. as I was idling I hit throttle and it seemed to stick around 12 mph then kicked to about 30 & pausex again before opening up. it then would eun good but lost about ten mph and was only hittn 6800 rpm . not sure what the problem may be can anyone help?
Sounds like a fuel system related problem. Carb, fuel filter, something like that. But I know nothing about the ski you have so that's about all I can say