I have a new motor that has approximately 10 gallon through it. Just in the last two weeks it has started surging at mid throttle. Idle is great, top end is greatjust in mid range. Suspect I need to adjust one or both needles. Don't care to go guessing. Any previous experiences with this would be greatly appreciated.

Maybe needle settings but if it idles good and transitions good it's already adjusted, also maybe diaphragm pump check valve in the carburetor may be worn a little, I have experienced that same problem before. check this thread out

http://www.rcuniverse.com/forum/m_7975257/tm.htm

It would surge just in the mid ranges Idle was good and top end was good. rebuilding the pump in the carburetor fixed the problem. see pictures.

Hummm. not so sure its worn since its a new motor with only 10 gallons through it.

Run the engine on the graund and check your throttle servo to see if it is ocelating causing the engine to surge.
A fellow at my flying field had the same problem and we discovered his throttle servo was causing it.

OOOOK, never thought of that one. Good possibility. Thanks.

Conventional wisdom says to lean out the low end jet to cut out the midrange burble. Your engine might be getting well broken in and running richer than it was when new.