used dynojet multi function hub can be purchased cheap and will allow 2 maps simply plugged into your pc3. mr12 requires a specific tune, throttle position mapping is by far the best way. expect power increases of 8-10 hp in midrange from 6k and 7-8 hp on top tuned properly. my torque increased almost 5 lbs. throttle response improved also. been running mr12 3 years now, it will be in my tank 3 days straight for the dragbike races this coming weekend as it has been for the last 3 years. I drain the tank, couple of gallons pump in tank, crank and idle till mr12 flushed thru system, about 3 minutes. no problems. opened shelf life less than 6 mos. and it is highly active in the metal storage can. basically nasty stuff to store due to expansion, contraction, and odor, siphoning and flushing is simple and quick. it's not much trouble at all for the performance increase it provides. just my experience. not a good fuel for nitrous though.
Last edited by gazx10; 11-02-2013 at 07:39 PM.