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I just picked up a real nice R60 w/OS 61 WC and it seems like its a little touchy on the high side needle. First, my setup is 680mm V1 mains,30% CP and a TT muffler. The motor is new to the heli, but should be broken in by now. I have been slowly leaning the motor and I get to a certain point and where 2 clicks in is to lean, barely any smoke,looses power and 2 clicks rich and it has a raspy four stroke sound to it, leans out under a load but quickly goes rich with no load.
Also, if I set the heli down and go to idle,the rpms are high for approx 20 seconds before it kicks down and idles at a "normal" speed. I have determined that the idle mixure is to lean as well, but wanted to get the high side mixture straightened out before I mess with the low. My midrange screw is all the way in per the instructions..... Any opinoins on this is greatly appreciated.