The bike, Stock Needle 3rd clip from bottom Aftermarket fuel mixture screw, Ziptie from memory 180 main 42 pilot leak jet was drilled to 30 from memory o'ring fitted Stock Exhaust spark arresting mesh removed from air box and all other emision restrictors removed Mild Temperature 2-300m above sea lev. The performance of the bike I cannot fault however there is a couple of things I would like answers too. The bike idles nicely and always starts first or second kick when cold. 1st kick when hot. 1/4 to WOT performance is more than satisfactory for my riding, I can't fault it. Cracking the throttle during this range is very responsive bordering abrupt. My issue is with off idle, when the throttle is very slowly taken off the idle position the engine start to run poorly and the revs drop off and maintain a constant speed. I'm only talking about a very small amount of rotation of the throttle 0-3%. If I hold the throttle in this position the bike holds a stready but poor sound. if the throttle is slowly rotated futher 3-5% the engine revs pick up substantially, up to where you would expect them to be. I can only assume there is a problem with the pilot circuit which is why I bought the fuel mixture screw to try and tune it better. What I have discovered is the screw is having minimal effect on the idle. I can screw it all the way in and the bike continues to idle. Opeing the throttle with the screw fully in does result in a major bog. turning the screw out barely changes the engine note at idle but does allow the throttle to be cracked without the bog. The bike has a large amount of decel popping unless the screw is turned a long way out. I'm tempted to take the pilot out to a 45 but thought I would canvas the pro's first.