Need a little help. On the 89 Trail Boss carb what adjustments are there and ballpark where should they be. I have the needle set at the third grove from the top (or second from the bottom). I have the idle turned out aprox 1 1/2 turn. The one I am unsure of; is there an idle mixture screw and if so what should it be set at? I know on a 4 stroke to richen the mixture you back out the screw, is it true on a 2 stroke you turn it in? Thanks in advance for any info.