When I did the Reinharts and Race tunner I was told that the bike did not need the air filter done, just wondering if having it done would make any differance. The bike runs great the way it is now, [highlight]just wondering should I just leave it alone[/highlight].
Well, of course not! Actually, you have some great dyno numbers with the stock air cleaner, I am surprised. If you changed it you'd have to load a different map, so it would be hard to measure what the air cleaner alone would do to your performance. It would be interesting to find out if you wouldn't mind spending the $$ for us! I took delivery of my bike with the H-D A/F, download and pipes, so I don't have a base of comparison. On my EVO dresser, which was totally stock it seemed like it made no more power, only a little more noise, above 4000 rps, or so. When I changed the A/F (and pipes, or course - and carb re-jet) It made good power right up to the rev limiter. There are so many variables, however there was a recent article in American Rider comparing the flow #s of various air cleaners vs. stock. Someone did some math and determined that a stock set-up did not flow enough to support a 103. Here is that thread
http://flhrsei.org/cgi-bin/yabb/YaBB.cgi?num=1150946678/4#4