I just did a couple of flights with an 18/8 Bambula. So far all I am getting is 7600 rpm on the 18/8. I even tried an APC 18/6 wide prop, the Moik hit about 7860 rpm.
My Moki is off by about 800 to a 1000 rpm.
I have a Moki 20/10 prop on its way to me. This is the Gold standard prop for this motor. With this prop I should see 7500 rpm. No Way, I would say.
After I try this prop, if the rpm is low, I will box up the motor and let Gerard Enterprise have a look at it.
I have two of the Moki 180's and both are stronger then the 210.
tonyc