Kev, Kyoto GP (and Rev) are an absolute blast in: XRT, LX4, LX6, RAC, FZ5, FOX, FO8, BF1, XFR, UFR, FXR, XRR, FZR. Probably RB4 too. The only cars in which it's probably not so awesome are the UF1, XFG, XRG (too slow for such a long track), MRT and FXO (which are gay by default). It is, IMO, by far, the best track in LFS. It takes some learning because it's got so many corner sequences and blind corners and turns with weird cambers. I agree with sinbad that it is somewhat ruined by how easy it is to cut certain corners and that's a shame because it has the best chicanes in LFS if you don't cut them.
But frankly, LFS racers bitch that the fast tracks in LFS aren't technical. You give them a challenging techincal track like that and no-one uses it. Westhill's another example of a fast techincal track and so is Aston North. Also, Aston Historic rev is a good challenge in a faster car (LX6, RAC, FZ5, all GTRs, FOX, FO8, BF1).