I've just gone through the pain of purchasing new tyres for my KX-S. In the end I settled on the Bridgestone D400's because I've had no trouble with them regarding wear, noise ..etc.. I considered the ADVAN ST and in fact they were cheaper than the D400's but the oversize tyre may cause more problems. I was told to watch out for the front tyres rubbing on full lock as there's not a great deal of room under the front guards. This can be fixed but added more cost. From a pricing perspective, the D400's were quoted by three of the larger national tyre chains at $550, $515, $489. Next I tried a smaller independent tyre shop called "King of Tyres" at Baulkham Hills (Sydney). They said $450 each - SOLD!! The best price I got on the ADVANS was $437 by JAX Tyres.
