I only had one out of a dozen motors that would free rev over 5400 on the stand most are at 5100... On the track we won races at 48 to 4900 rpms ... if you get a weak one take it back and go get another one it will be cheaper than screwing with the rules to obtain the magic 5500 .. leave this class alone ,,... lets not spoil a good thing like they did with the clone class when they went from 300 to 1200 dollars... allowing this ,that and the other thing . this is now the biggest class going on a weekly local track basis . lets keep it that way !