Honey bee King need help

My HBK2 wont stop spinning to the right. When throttle, up the tail servo move toward the front. I have check the wiring and change the servo. And still the same.

I had a similar problem twice, first time I had to install the 43t upgrade, the second time it happened the main motor was dying, but for now make sure your belt tension is good, that can be another reason for it spinning

Thanks, I will try that this weekend.

check your tail servo if it is functioning properly and if it is in the right place on the tail boom. slide it up and down
a couple of millimeters at a time each way. what gyro are you using? if it is the standard one that comes with the king set the gain to about 80% then get the servo in the right position and use the TX to trim left or right.
if you have a HH gyro do the same set up as above in rate mode then swich to HH mode and use your trim.
there is no substitue for good mechanicle setup.

i assume that all you kit is standard out the box stuff.