Thanks for the info. AFRs have made sense to me for a long time... but fuel trims have been a 'smile and nod' topic for me since I've been on these forums... and hadn't done any (modern) tuning in the past.
Looking back at the old posts... if one wanted to get a stock air bypass valve (recirc)... I looks to cost <$13. Pretty sure that's it...
http://hondapartsnetwork.com/part/9714224/Honda-Part-36180-59B-005-Air-By-Pass-Valve-Control-Solenoid-Valve-Assembly
Yeah... when the 370s got it in '09 I thought it was just a gimmick. Syncro-rev-match something or other.
If you do it I will ':bow:' you... and be eager to try it, but I bet I'd keep it off after my trial. My feet seem to be able to do a good enough job to where it the clutch is getting an...