I got my air filter out of my 2007 990ADV and would like to change my spark plugs as well. Can that be done without removing the tanks? I have only changed the plugs once while I was checking the valves and I can't remember what all has to come off. If it don't have to take much off to access the plugs with the filter out, I will change them now, otherwise, I will wait till I check the valves again. Thanks!