I was running an R-77 full system on my 09', FARRRKK best thing I ever did. The thing use to launch up on the back wheel at 90mph in 3rd. Totally stock besides the system, No pc, No BMC. Got it dynoed the A/F was spot on 13.5 across the range. It was wet that day it topped out at 190rwhp, embarassing as it is ... its the first time I ever used the mode selector (c) all the way home, dont tell anybody, it frightened the hell outta me, till I got used to it !