@Piboso: I've found what are spg0, spg1, sdg0, sdg1, sig0, sig1 (doh, I should have figured that out), not too complex.
But what are KYaw, KDamping0, KDamping1 (in the bike.cfg) ?
Side question: which are the parameters of the relaxation length simulation ?
I've been looking in the .tyre files but ...
MaX.