Fouled spark plugs, back firing, blue flames out of exhaust, and trouble starting up quad. I did different settings but none seemed to work. Im just sharing my experience and not saying they are not any good. Switched to the PCV and none of these problems occurred ever again. In my opinion the dobeck controllers seem cheap compared to the PCV. If you have the extra bucks I would save myself the troubles and get the PCV from the start. I wish I had done that from the beginning.
Renthal 13t sprocket, FMF powercore + Powerbomb header,PCV, UNI, Pro Armor Fat Peg nerf bars & Skid, PRM Baja Front bumper, AC 6-pack rack, Renthal Handle bars, 6K Xenons, Kenda Kutters XC, Acerbis Uniko, ODI Grips