hi new here and to kid karting i have a c51 that revs to 11700 rpm on the stand i know this does not count after modulating the throttle a few times at wot it will clean up and rev to 14000+ it has a 58 jet k&n filter ngk bpm8 plug gapped to .027 i thought this might be due to a rich condition so i stepped down in jets it now has a 54 jet when it is cold 160 or less it does the same thing but does clean up sooner when it is hot 180 plus it will rev to 11700 pause for a second and rev out to 14000 has anybody heard this before and how do i just get it to rev straight to 14000 thanks