T-Rex 700 Clutch/Vibration V-Bar Problem

[jamiem]

I'm chasing an EVIL vibration on my virtually new 700 which I believe is seriously upsetting the V-Bar, and it seems like it may be the clutch. I'm suffering with a terrible but intermittent roll to the right, sometimes quite violent, so today we ran the spektrum analyser with the bluetooth dongle connected. At idle it was around 1100 (peak @ around 8000rpm), in the hover it was over 2000, and while tic-tocing it was peaking over 4000 (both of these @ around 15-16k rpm). I don't know if these are ballpark figures (albeit very high) for a 700. Has anyone ever run the spektrum analyser on their vbar 700?

Are the standard clutches known to be out of balance? If so, what options are there? I don't really want to go Quk as they are a very tight fit, and being that this is nearly new I don't much fancy my chances of getting it in there.

Anything else to do/check? The blueline sensor is mounted on the radio tray with a thin pad to the metal plate, then a thick futaba pad to the tray with a velcro strap loosely wrapped round it.

[GravityKills]

The plastic clutch mount gave me nothing but trouble. Now it's upgraded in both my 700N to the Align metal upgrade.
Also I've had vibration problems, but careful assembly helped (see earlier post).
In other words, I managed to create additional vibration problems by sloppy assembly in my 700, doesn't automatically mean that more careful assembly would solve problems on your heli

[jamiem]

I've just been doing some investigating. I dropped the engine, clutch looks perfect, appears to have even wear on both shoes, and isnt sitting wonky in the bell. The vibration at idle was 600 on the floor, 300 if i picked it up and held it off the deck. If I took the strap off it went up to 1100! I rotated the clutch 180, and it was as good as the same. I'm at a bit of a loss

[Diddy Man Bling]

When my dad and I built my Trex700 we had to remove quite a bit of metal to balance the clutch bell.
We were amazed how much the bell was out of balance when placed on our Du-bro.