Hi!
It's very simple! As it is an ABN engine you start it at idle (Throttle open aprx 2mm) and then give full throttle as it starts then and adjust the high speed needle so that the engine rews at a farly high rpm! Not bludderng rich and not at max rpm , but at a couple of thousand rpm under max. The important thing to remember it to let the engine get varm enough ,fast, and that has to do with how the cylinder is expanding away from the piston at high temperature. If you run it at bluddring setting (rich) the temperture isn't going to be right, and the engine take longer to run in (the engine isn,t treated right)