What mill do you have in it? What problems are you experiencing? How many gallons have been run through it? What kind of fuel are you using? Have you tried returning the needles to stock?
If you can answer these, I'm sure someone here can get you pointed in the right direction.
I can tune it for ya....just send it to me and I'll tune it for S Florida humid ass like weather....so when it gets back to you it will still run like ass.....