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Well typically going rich (adjusting pilot screw - doesn't matter if its an air or fuel screw) lowers the idle speed and going lean increases the idle speed and that's what I'm experiencing with this screw giving me feedback its an air screw, it is actually a Fuel Screw for a Keihen (bought that because I needed to replace the existing sharp pointed screw but its functioning as an air screw on this "clone" Mikuni. Its got the sharp tip for as a fuel screw and its for the Keihen, but this VM26 PZ30 Mikuni clone had the same stock sharp tip air screw not the dull oval'ed tip. I don't think this clone copy follows what typical.
The needle jet, not the needle, but the sleeve around it that holds the main jet, is another mystery part not found anywhere else s far. The Yamaha TTR125 has a similar shaped needle jet, but it doesn't appear to have the same amount of holes. I believe I'll have to cross drill (has series of cross drilled holes) this part to increase the fuel.
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