quite a few of us on this site were trying car tyres on the Rocket before you even knew what a rocket was, I kept mine on for 10000miles then went back to the MC tyre
Car tyre has two and only two advantages over a MC tyre
#1 It lasts longer
#2 It helps on the rear brake for those with out ABS
Main reason people go darkside is to save money, and if you ever watch the racing at the Isle of Man you will NOT see a car tyre on a bike and just one of those riders have more knowledge about tyres/handling than this whole site combined.