I've got slashcuts - no rejet, stock air cleaner, etc. Plugs are fine. Gas mileage is low to mid 40's. I compared the mileage to the stock pipes and it seemed like my mileage actually improved a bit with the Bubs on
I spoke with the factory (February?) and they are now advising new owners to rejet - because they say the newer (post '04) bikes are set even leaner at the factory (you guessed it, exhaust standards) and so Bub changed their rejet recommendation.
