corey the rev box depends on a few variables:
1) the set up you ride
2) the way you ride
3) your motor set up
I did not say it was some sort of miracle worker this mod in performance term rather a modification that is light on the wallet for enhancement of pre existing engine characteristics. I have done my fair share of modifications to all lifan motors ( black 125 with cast iron head ,grey 124 alum. head and 140 grey motor) and can pin point certain improvments to the motors with these modifications.This rev box reacts variably between set ups , I run a Keihin Pd24 (crf100 carb) with ported and polished intake and exhaust outlet in which could vary. This review is honest , no **** I found the engine had more mumbo in certain parts of the power curve. I also tested this box in a variety of terrains :
-Bmx style jumps ,tight trail jumps etc
-Minicross / natural mx track
-Open grass padocks
-Gravel slick roads
-Wet terrain
-Firetrails
-enduro single track
-Skateboard/bmx ramps and wallrides /playgrounds
just last week i swapped my standard box over due to being sheer bored and went for a slash around a 2 acre grass track and could definatley define the two boxes tried.
Not Doubting your experience or knowledge with these rev boxes but my experience with this rev box has provided me with further performance gains , not adding power but improving it. Thanks for your input though