I would consider the plug as well,mine came with a OSA3 plug which is great for the break in,since it runs a bit hotter,but after several tanks my plug began to foul and the engine ran poorly,durring break in metal shavings can foul plugs rapidly once this is over the life of a plug is quite a bit longer.
after switching to a OS#8 its a smooth runner,my needle is set about 1 1/2-1 1/3 turns on the HS needle,2 1/2 turns is a bit rich for the 46 AX 2 turns is a good starting point,I am just starting to notice the low speed bogging that comes with a fully broken in engine,after several gal of fuel, its time to lean out the low speed needle.
if you are not comfortable with this then a little help goes a long way for tuning, since just a small turn is usually needed on the low end.