One thing at a time. Think throttle position. Think what jet controls that. Ignore plug colour and spooge.
Reason, you can be lean in one area, rich in another and those two symptoms won't tell you where.
I'd try drop your needle, if it gets better try the top clip. Again this controls 1/8 to almost 3/4 . Then work on idle mixture screw and change pilots if you stop getting improvement. Then main.
Anecdotally I needed leaner settings on my 07 after squish and head mods. Results may differ.
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'07 EC300 GG
'14 TXT250 GG
'? 496 CPI Cheetah RZ/RGV hybrid
'22 765 Street Triple RS
'21 XTrainer
'69 Stinger T125 Suzuki
'23 TRS 250RR (it's a Trials thing)
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