the Cyclone S comes with a 96T 64P spur.
the Cyclone however comes with a 100T 64P spur. i believe this should be the same for the surikarn/hara/moorespeed editions.
from my experience with a 96T (64P) spur, iirc (64P) pinion gears with 37T or less don't mesh well with that spur gear, due to the limits in the slots on the motor mount.
easiest solution is to get a spur gear with higher teeth, unless you want to dremel the slots in the motor mount.
btw if you look carefully at the spur gear included in the Cyclone S / Cyclone set you'll notice the word "XENON" around the teeth
. i use a 106T Xenon spur gear, works very well.