This Kawasaki STX1100 happend over heat problem.
This problem cause from cooling hose joint between jet pump to engine room.
Cooling water pick up from jet pump and through this tube then send to engine,
however this case the plastic joint tube been split and water leaked from there.
In short this is cause of this motor get over heat.
This plastic tube will split after long time past but this parts can`t get from Kawasaki, I don't know why
because we made this parts by alumimum so now no warries!!
