I just bought a arttech hughes 300 400 class heli. I can get it in a hover and hold it but I get a wobble after it is in the air 30 seconds i get a wobble not a tail wag but if I run the head speed really high no wobble. But if I run the head speed that high I am hovering at 90% power this thing has never been crashed. Any suggestions?

Have you checked the balance of your blades? Doesn't take much for them to make a nice wobble. I would also see if your blades are tracking properly.

I have checked the balance of the blades the tracking and the flybar everything is good and still have the wobble.

Some heli's like a higher headspeed and based on what you describe, that seems to be the case.

There is nothing wrong with 90% power and a lot of us run 100%....the motor is actually more efficient when run full power.

Skarn

maybe take the head apart
pull the feathershaft , and mainshaft and roll them on say like a glass or eqivulantly smooth surface.
if there is any wobble in these parts it will cause a terrible vibration.

but like the other cat said you can get a low speed wobble, some heli`s dont like a slow head speed

I recently purchased a art-tech Hughes 300 (class 400) heli.  I am new to the rc world.  I haven't been able to figure out a few things.  I have an e-fly 100c transmitter.  Is SW2 on the top right, which reads NOR/3D for novice/expert pilots?  ALSO, what does the switch on the front right, labeled CH1.2.4 D/R, do.  Is it anything on the Hughes 300?  tHANKS.</p>