Need some advice please. I have a 06 Heritage with 8K miles. Bike was getting about 35-36MPG normal riding (mostly Interstate, 70 or less). Pipes were black and nobody would ride behind me because of a fuel smell (not me!). Anyway I took her in to the dealer and they said everything was OK and that was normal (and stoled 60 bucks from me for DIAG charges:spank: ).Now I have installed SEII exhaust and a K&N breather. Bike runs fine, but now I am down to 32MPG. I don't think this is normal. Help!!!