i have been reading this whole thread to try to weed out the good and bad ideas and have tried them all.....but the 1 i like best is: GET THE MOTOR TO OPERATING TEMP,THEN DO A COUPLE HIGH SPEED RUNS AND LEAN THE HIGH SPEED NEEDLE LITTLE BY LITTLE TILL IT BOGS @ HIGH SPEED THAN RICHEN THE HSN ABOUT 1-2 HOURS DEPENDING ON YOUR OWN LIKEING.....THEN LEAN THE LOW SPEED NEEDLE LITTLE BY LITTLE TILL IT BOGS WHEN THROTTLE IS QUICKLY APPLIED,THEN RICHEN IT ABOUT 1-2 HOURS DEPENDING ON YOUR LIKEING AGAIN....IF YOUR MOTOR IS IDLEING ALITTLE HIGH JUST BACK OFF ON THE IDLE SCREW TILL IT IDLES AND THE CLUTCH IS NOT ENGAGING....AFTER THATS ALL DONE YOUR MOTOR WILL SCREAM! AND IDLE GREAT!