[Bmacco001]

Pulled the carb again. Realigned bowl orings cause it was dumping gas and resprayed and blew out everything again, added k&n fuel filter. Got that taken care of fired it right up. Idled good. Revved good. No backfiring. Revved a couple more times noticed the rpm decided to stay at 2k this time. Also look down and noticed smoke what looked like the header pipe connection, before that there was a bit of dark liquid dripping from it that stopped after a second or two. Looking closer looks like it might be coming from the area in the image. Hard to tell, nothing obvious seen. Thought maybe i started leaking oil. And the rpm wanted to stay at 2k now so I adjusted the idle cable and that solved the rpm issue. Doesn't start smoking right away even when engine warm, takes a min to start. White starts faint snd then alowly builds up.

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[Geo Smith]

It may be oil leaking from the plastic clutch cover onto the header causing it to smoke when it heats up. Apparently, this is pretty common. The guy in this video was able to solve it by simply removing it, cleaning it up, and reseating it. May be worth a look.