hi all after i lifetime on sportsbikes decided my bones could,ent take it so got zzr 14 good bike,but needed somthing for playing on and few trackdays, never had a twin so got black 07 tuono.it needs new tyres , i noticed it has 190 55 is there a reason for this or am i better going with standard fitment any sports tyres suit better than others, cheers buntsb