I'm riding an 05 800 custom with about 14000 miles on the clock. It came to me with debaffled V&H cruzers. I have the parts to grampsize and plan on doing the valve adjustment while I have it apart. What does a full tune up consist of on this bike? Is there anything to be gained by iridium spark plugs? Any after market ignition upgrades for more power? Anything else that I need to do while I have it apart and accessable? I have very limited knowledge of performance upgrades or even maintaining a V twin, so I am hoping that you all can point me in the right direction.