Trying to sort out a previously modified setup. Previous owner's setup ran well with no dead spots or hesitation: -Stock motor and airbox -Full FMF exhaust -28mm Mikuni w/ 230 main -Float height 26mm below gasket seat -Needle clip at top position -Gunked up fuel inlet-- not sure if that factors in My new setup idles and revs fine. When riding, low power in mid and top end. Will not rev high or pull hard. Barely pulls me up a hill. Here are the changes I made: -Had to return to stock exhaust header -Adjusted float height to 21mm below gasket seat per spec -Cleaned gunk out of fuel inlet -Using a different fuel line, but it still mates to carb fuel inlet so I'm thinking diameter is fine -New fuel filter Tried different combinations of needle clip and air/fuel screw starting at 1.5 turns out. It seems to run best on the leanest settings (clip at top of needle, air/fuel screw out around 3 turns). Not a massive difference, but noticeable. Tried swapping a smaller main jet from a spare knockoff carb. Not sure on size as it was unmarked. Smaller main jet made some improvement, but still lacking mid and top end power. Any guidance would be appreciated.