Hi there Bren,
Thanks for that info but i have been in touch with Kawasaki dealers up here and they did say that these bike had been recalled years ago for a modification to the carbs which they added the hot coolant pipes throught the carbs to help keep the fuel from freezing.
What i did, stripped down the coolant system, because i thought maybe an air lock in the system, and put in some Pro FST in the tank, which prevents carb icing.
Took the old girl out in the cold, (-4) that day, and she ran without a hitch.
I have heard that if you do experiance carb icing, the best thing to do is (as you say) sit with the revs up which inturn will heat up the fuel within the carbs, then after a couple o minutes you can be on your way...
Kawasaki carbs are about the only ones that i have heard of this, seems strange in this day and age with technology that you do still experiance carb icing.
Never mind soon be the good weather...:-D :-D yeeeehaaa