660 raptor lean condition???
 

I took the flame arrestor out of the pipe, now its running the way its supposed to.. B4 it just sputtered in mid throttle.... Does that seem right???. The plug still look a little lean.. Yosh full ex. pipe,, open air box,, 165/170 mains... 22.5 pilot jets..going to try 25 pilots....And slightly higher comp. Piston..