KST DS725MG vibrations

[Surf Rider]

Hi Guys!

All three KST DS725MG cyclic servos makes a lot of noise, vibrations and heat up at in the zero position with Spirit Pro. In other positions the servo works fine. The tail servo BLS805X on this same FBL works great in any position.

The servo frequency is correct 1520μs/333Hz and even when it is reduced to 150hz the noise does not disappear. If you reduce the BEC voltage from 8.4V to 6V, the noise disappears a little but still remains.

When I connect another servo (Align DS525M) with the same frequency it works absolutely fine. When I connect these KST servos to another FBL Spirit GT the problem remains. That is the problem is precisely in the compatibility of DS725MG with Spirit.

Technically the servos are fully functional. Inspection of the servo gearbox did not reveal any problems. Probably the problem is in the FBL settings. I am attaching the file with the settings and hoping for your help.