23 A K&N; filter was chosen by F’NA for its easy cleaning and high-flow capabilities. Still strapped to the dyno, Dustin made a number of pulls to gather the information we were seeking. Some odd things occurred and just proved that a proper combination of parts was key to achieving a smooth and powerful engine. Without a precise EFI tune for this specific parts combination, the F’NA intake lost 2.4 hp at the 5,700-rpm peak, but gained 1.0 lb-ft of torque at the 4,100-rpm peak. That wasn’t the interesting part though. The new intake gained quite a bit way down low where the bike would spend the majority of its time running. At 2,550 rpm, F’NA’s tubular intake made 1.5 hp and 4.0 lb-ft of torque more than the Stage 1. That is a jump that could be easily felt in roll on throttle. Low rpm increases ran from basically zero all the way to the 4,500-rpm mark before the F’NA parts star losing to the Stage 1 breather. Next issue we will delve into the new Power Vision for a more in-depth article on how the unit works.