You r running rich. Black smoke is better than white smoke. A lil puff of black smoke won't hurt. But if it's a lot, I would try re set ur carb. If its bad an you leave it, your gas milage will b bad an you will foul plugs.
IMO, I would advance your timing just a lil bit more.
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Issue Date:12-15-1791-Expiration Date:NEVER
*02' TJ aka-MarshBuggy, Gone but NEVER Forgotten