Trying to dial in my idle and get rid of a slight low rpm bog. 2003 wr450f. Full fmf exhaust and twinair air filter. I dropped down to a 45 pilot jet and it seems most of my low rpm bog is gone. But what I don't get is I can screw in my fuel screw all the way and it doesn't kill the bike. How can the stock size 45 pilot jet still be too rich even with the exhaust and filter? When I bottom out the fuel screw the rpm just raises. I've got from a size 50 pilot to a 48 and now I'm down to the stock 45. No matter what I can tighten the fuel screw all the way and the rpm just increases.