Any one doing it? My bike sat for a good while and I've always felt like after all my mods I lost a lot of gas mileage and keep feeling like I'm running rich. I can smell it but I do still get some backfiring when slowing down. I've played with my tuning over and over, have yet to actually check my spark plugs because of course I didn't get the tool kit like most did with the spark plug puller. But considering I have the Cobra pro hp 2-into-1 and the kuraykn hypercharger pro r which are supposedly the two best mods for hp gains (so said at the time of purchase over a year ago) I'm thinking of going a step colder. Any thoughts, opinions or experiences?