OK Kawicam, I think you need to lie down now. In the other post you noted that people don't pay attention to what is typed, and there you go. Nobody said that there was a KX100 Expert, but mention was made of a big wheel KX100. It is a big wheeled bike, and there is no small wheel version. In fact, the 100 is the SuperMini version of the KX85. Kawasaki is one of 2 manufactures that has an exclusive Supermini (well intentionally) KTM is the other with their 105. Before somebody calls foul, the 150R was not intended to be a Supermini, Honda wanted it in the stock 85 classes.
As far as the YZ85 Expert version, Yamaha doesn't actually produce it, you have to buy a YZ85 and then you can buy the parts for the conversion. It is possible to find one that has been converted, but good luck with that.
Oh, and the dealer may repair every brand, but does that dealer stock parts for every brand. If you need a brake lever on race day, can you expect to find one for the KX at your local Yami shop. Probably not, but they can order one through Parts Unlimited or Tucker Rocky, and if your lucky, they are close enough to a warehouse to have it in 2 days.
Sorry dude, you should have left this one alone. :(