Apologies mods if this is the wrong place to post!!! looking for opinions on pulp choices. PS have stressed NOT to use Vortex or Optimax on the new Viffer. Being aware of the amount of additives and crap they put in this stuff and how badly it can clog up jets, plugs etc, especially in m/bikes I've stayed away. I found the Hyosung runs BETTER on regular unleaded than premium, but am interested to know what others' preferences are when it comes to fuel for their ride.