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is there a low range speed limiter on my 17 Pioneer 1000,around 33mph it will start missing and chugging, high range I cant get it to 7000 rpms any more since I put new tires and wheels on,top speed now is about 59, was 67 with factory wheels and tires, I hope somebody has some answers for me, I just put a new air filter in, old one was pretty dirty, not much difference in performance though, thanks