Maybe completely different problem, i broke my hong nor lx2 in on saturday morning, got it tuned so it was running sweet. before i
packed up i could hear a rattling noise but thought nothing of it, went to my dads to let him see it going and when accelerated of the
line it was reving its tits off but not realy going anywhere fast, realy hesitant. i also thought it wasnt tuned right at first but on close inspection
the rear cap joint that holds the rear drive shaft had come off (grub screw had fell out) must have been loose in the morning and fell out when
i went to my dads.
maybe a completely different problem you have though mate.