So, i took a brief look at some PS1 Kart Racers:
MegaMan:Battle And Chase-Seems to let you strip defeated opponents Karts for parts...
Bomberman:Fantasy Race..nothing really stood out.
Crash team Racing look impressive, but again, seemed forgetabble.
Konami Krazy racers had good cast:Gray fox, Vic Viper, Dracula etc.
But all of these seemed pretty much forgettable goods to my eyes.