I have a new saito 72 after break in plus 1.5 hour more but never flown.
I tried anything in order to adjust it after break in but the engine idle is still rocking very hard (it never goes down 3200 rpm)
i adjusted valve,replaced plugs,got help from club members (mostly 2 stroke fliers) nothing helps.
the problems ranged from engine can start to engine starting but can't hold idle, rocking hardly to turn off when booster disconnects.
The guys at my club tried to play with both idle and main needles and the best result was when the main needle was opened just 1.5 turns (seems to me to little) and the idle needle was readjusted again and again. at this point the engine got up to 8700 rpm and was rocking hard at 3000 and below and could not hold idle for long ( 1 m top).
I spent the last 2 days ( more then 6 hours each day ) to try adjusting the engine but all the above problems appeared.
at this stage i really do know what to do (both main and idle needle positions totally changed).

what can i do ?
- should i start adjusting main needle (how much to open)
- should i start adjusting idle needle (how much to open)
- should my my idle be above 3300-3500 rpm (under that starts to rock)


sorry for this long message but i really need some big help

thanks

* by the way disconnecting the booster from the plug engine caused rpm to get low (mostly) even thought i replaced the plug ( os F) after break in