I have a PCV and AutoTuner on my bike w/a full Akra w/long can. Did it all at the same time, so I can't give you impressions of before AutoTune and after. As far as the AutoTuner not doing "something special", I'm not sure how to answer that one. It's doing what I wanted out of it, which is to produce custom maps for my bike (now - one for each gear) based on my current environmental conditions... and as that changes, so do my maps right along with it.
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I just installed a auto tuner and I really noticed a difference in how smooth the bike runs. Also the mid range has come up somewhat. I am running a 6 gear map thanks to the simple install DIY Mr 1000RR left us and so far so good it was dead easy to do.
Thanks fellas. Some ppl dont know **** about what they talk about. I had a feeling that it was have some type of changes...just didnt know what. Wasn't sure of how much of an impact it had on the midrange.