This photo shows the original kawa tyre valve on the left, made from very thin aluminium and easily broken by your knucklehead tyre guy. they are £48 + from the stealership, yes there is a bit of blue tack holding it together for photgraphic purposes
the one on the right is almost the same as the one my tyre guy used as a fix , it had a longer stem and the nut on the top was a normal nut with no sleeve atached, made from steel its fitted to my bike and has survived a 3000 mile trek around the alps, costs less than a fiver but he had a box of redendant ones of old vehicles ect, im sure most tyre places have these things.
the base of the valve pins the black sensor to the inside of the rim with a spring, these is no rocket science behind these expensive kawa valves , just a long stem to go through the middle of the sensor
(http://i55.photobucket.com/albums/g133/neill1200/DSCF0102.jpg)
kawasaki original valve fitted
(http://i55.photobucket.com/albums/g133/neill1200/DSCF0103.jpg)
replacement valve fitted, not as flush with the nut , but stronger and a whole lot cheaper
(http://i55.photobucket.com/albums/g133/neill1200/DSCF0104.jpg)
Just thought you'd like to know