I was wondering if it is normal for the RPM to go up and down while keeping constant pressure on the accelerator.I noticed today while sitting in neutral i reved it up to 1500 and tried to keep it there.It would go up to about 1700 and drop to 1200 and back up and down,would never stay consistant.I went up to 2500 and then it would jump to 2900 then drop to 2200 and back up to 2900 and down again.I made sure I was not doing it with the pressure from my foot.I was wondering if this was normal.
Thanks in advance.