I'm hoping someone can help with this issue I've been having for a while, although its only put me into the ground once its still really annoying.
After about a minute or so of flying on my king II and every few minutes or so there after it acts as it almost completely looses power for a split second and it generally kicks the the tail around 90 degree's or so although generally doesn't loose altitude. I've heard that it could be the belt building up a static charge and then zapping the gyro every so often, but I lubricated my belt as I was suggested to do and it really didn't seem to help. I'm wondering if this still could be static issue somewhere else in the heli or something else all together. I'm running the esky 3100 brushless and speed control combo and a telebee gyro, I was thinking that maybe the speed control is glitching. Anyone else run into this or have an idea?

Lubing the belt? You want the belt to not slip, generally lubing the belt makes it slick.. Is your belt tight? Kings don't usually have static problems with there belts. IF you were going to put anything on it for static it would only be dry graphite dust. Same belt runs dry on mailing equipment many times faster. Static on a king is usually caused by a high frequency vibration. cure the vibration and the static goes away. Carbon fiber boom on the king is prone to this. I had a custom fiberglass boom that I made and had static and glitching problems beyond your wildest dreams.
Tie it down to a bench and run it up to its flying speed and watch for the disk or rotor to suddenly change in speed or appearence, also watch the servos if your getting glitchs you usually see in your servos under the head twitchin. If your speed control is cutting out it will also do what you are experiencing. there has been problems in the past with the 3100 motor and the esky speed controls. Usually if you replace the speed control with a NON esky one of about 25-30 amp it cures most problems.

I actually do have a semi custom carbon fiber tail boom from an AXE, although I did notice this issue before putting on that boom, so I am somewhat ruling it out for now. I know few local guys who run trex 5&600's recommended lubing the belt, which makes sense to eliminate static, and since then I haven't had any slipping problems so I doubt thats it. I still am really skeptical about the esc though, I'll see if I can't pick up something locally and give that a try. Otherwise I know a lot of the 500 and 600 guys actually ground their tail boom and frame to the negative cable on the battery, I'm wondering if that may help too.

My heli did that sudden 90 degree turn on me before and the problem is a malfunction HH gyro. I put on a new HH gyro and solved the problem.

Unfortunatly you don't have a trex or their design of tail so if they lube their belt they still have that idler to hold tension on the belt which runs on a much larger pully (less bend on one sideand more tension on the belt). The King doesnt come that way and only has that tiny cog pulley to collect gunk in and fill the cogs, dirty belt from lube and slipping is common on Kings. Due to tiny stock boom you cannot install a larger pulley and even if the boom was larger and you could you are still limited by the size of your main belt pulley as far as getting up tail speed for tail control. That is why there is a 43t conversion for the main pulley.
It is common to ground the boom to the - battery with the cf boom on a Trex when they couldnt locate the source of static vibration or correct it any other way. the Trex 500 seems to be very prone to static and it has a metal boom.
I usually bench test and try to duplicate the problem. Also if you have a way to tie it down do it outside so you do not have interferenc from say flourescent lights etc.

kbohm1 , I too have gliching with my king2.It is worse outside and not as bad inside. I am going to change radio's.I have a futaba 7cap and a pcm rx. I am hoping this will take care of the problem......................

I first thought the radio was an issue also, but I've had the exact some problem on my stock TX as I now have on my dx6, I've ordered a new non esky speed control to see how if that helps, otherwise if that doesn't help I'm going to try some different grounding ideas. I'll keep this thread updated if I make any progress.

you might try installing a ferrite coil on your conn from the esc to the rx first just a precaution I put them on all my planes and the heli so I can rule out rfi interference. the new ones clamp around the wires instead of having to take the conn appart to thread them through one of those little rings.