I have been running mine since sep 1
I'm using 89 oc 50-1 belray h1r and a 19X8 xoar
It has been a great running motor never dies, great power, smooth, and easy to tune.
On my pilot yak it has crazy power, more than my 50cc planes.
I have got a 2nd one for my new plane a DVII. after the first one ran so good.
I have not done any mods just put it on the plane and tuned it one time and have not had to do anything since.