2005 honda trx90 adjustment on carb need to know how many turns out to set it at

 

Usually about 1 1/2 - 2 turns out to start with, then fine tune after warmed up with engine running. Typical for most engines

 

2.0 turns out from lightly seated is the general baseline for the a/f mixture screw as mentioned. To set it, get it warm, set idle fairly low, then turn in slowly until it stumbles, then out until it stumbles, then back in to where the idle sounds the smoothest...that will get you very close...