[HydroDog]

Jetting is all depends on how you ride. Are you going to ride 1st gear single track well then that 38 pilot might work for you; I run a 38 in my 07.
A 170 main could be OK unless you hold it wide open for long periods. Since you opened the air screw out that means you wanted it leaner. I've been riding a few years now and I have never seen anybody seize their bikes because of a lean pilot or needle; bad jetting = bad throttle response at lower RPM and a poor idle.
A rich main jet will run like crap (spit and spudder but never clean out when pinned) at high RPM but a lean main will sound good but will toast your motor, so it is better to be rich on the main and then slowly back off just to the point where it runs clean for the area you ride at.