Mini Titan vertical tail shaking !!!

[Primus]

Hello, does someone can help me with this issue:

I have the MiniTitan, the ARF version with motor and ESC, it' s fly well, but:
In hover fly, sometimes i have a vertical tail shake, especially when i spool it up or down...

I've checked the rear swash servo, nothing wrong with it...
I've shorted the screws that came in tail housing from the left side (looking from the back of the heli)...so no belt bending...
The belt seems to be tensioned enough, i don't know what it's not ok...:(

Do you have this problem?

Any help will be much appreciated!
Primus

[R.Lim]

Maybe you should decrease the gain slowely until the tail doesn't shake. But it is depend on your gyro

[BarracudaHockey]

Vertical shake is usually blade or head balance.

[Primus]

@R.Lim (http://www.helifreak.com/member.php?u=39208)
gyro works on horizontal plan..
This is vertical....

Blades are balanced, spot on, well tracking...

Something else..?

[TT_Felix]

Check out wearing of dampers . It degrade quickly without proper greasing . I use white Lithium and result is quite good .

[liaan]

you running standard curves on throtttle?

i had to push above 85% to get it stable .... everything was balanced as well... well, its now in pieces after it self distructed ... http://www.helifreak.com/showthread.php?t=57503

always had big wobble on spool up/down.. also make sure your blade grips are tight enough..

L: