My bike, a 2000 Fat Boy, 4000 miles on the odo, came to me in pristine condition. It has V & H Longshots and was running without baffles. To this admitted novice (40 years since I last rode) it runs very well and has more power than I need. After being on the site several months, I read repeatedly about the need to rejet the carb after changing exhaust and/or breather elements. I noticed that the bike did pop back a bit with deceleration so I reinstalled the baffles. That quieted the exhaust just a small amount and decreased the popping back also. The Boy still runs well although cold natured. Short of tearing into the carb, is there any way to tell whether I'm running lean or rich? Spark plug color? I'm progressing slowly on doing some of my own wrenching but don't want to join the "If it ain't broke, fix it til it is!" crowd. Thanks in advance for any comments/advice. Ishmael PS Intake is still stock PS to the PS Those baffles surprised me in that they are very minimal slip-in tubes with some louvres punched in them. I guess that's all thats required to give some back pressure?