royster81 wrote:your bike goes against everything i have read on this forum but...
some say don't touch the snorkel,you pulled yours out...
some say don't cut the filter base ,you chopped yours off and everyone says don't remove the flap,you not only chucked it but put in the HRC tray.....

LOL, I know, and it all works too. Maybe I just got lucky with my 'seat of the pants' set-up, or maybe that the bike rarely sits below 9/10,000rpm mean that I don't see/feel much below that. It's been a really long time since I've had the 400 out (about 4 months) and I can't speak of performance as a recent thing, but the bike pulls strong from nothing right up to 16k.

Smev, do as suggested, standard everything, 118f/120r and take it from there. Help is always only a few button clicks away. When I ran the Yamamoto on the track bike (pre-ram-air) I had 122f/124r, HRC foam filter, adjustable needles on the 3rd clip, HRC rep tray, no snorkel, 2.5 turns on the a/f screw and 2.5mm drilled slides.