1. R

    RXT-X 255 not going past 50 MPH when usually goes 70

    I verified I was using correct key, even tried learner key and it topped at 40 as it should. I had mid grade ethanol gas in it but burned most of it out last use a few months ago at less than 1/4 tank (when it beeped). on the ethanol mid grade fuel it ran a little rough at first but once...