Basically tuning most all engines is about the same. To begin engine must be broken in by running (preferrably on the bench). Depending on engine this can be done in just a few tankfuls. This though will differ if it's a ringed engine which will take far longer. Once broken in start by leaning high speed needle to get max rpm then back off a bit. Next bring it to idle, it should run fine but if not you may have to adjust low speed needle. Do this with only slight adjustments. If there is an improvement readjust the high speed needle again since low and high do interact to a degree. If all is well now go from idle to high and see what it does. should do fine but if it quits low is probably too lean. If gurgles and hesitates going to high, low is too rich. You want a oerfecly smooth transision. Usually all this is not difficult but does take some practise to define what needs doing. Once you think you have it right then put in plane and check there could be needing slight readjustment due to tank location etc. final test is when running at full throttle carefully raise nose straight up if it leans some open high speed slightly .