hey guys i have a jetting question. i recently bought a carb off of a 82 or 83 kx125 and bike runs good with it but at high rpm it kinda falls flat well i was looking at it i do not see any way to adjust the air fuel ratio there is no screw nor is there a place for one . i notice it is a little lean the plug i have is just a little hotter than needed now would this cause the lean burn, i just wanna know why there is not a screw for adjusting this, and if the the hotter plug would cause it
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