bentwheel wrote on 12/31/69 at 16:00:02:You have been given three ideas on how to solve your problem. That is a good thing. You already discounted the leaky exhaust theory so now you have two left. The filter replacement requires you to order one and wait for it to arrive. Right now, you can go to Radio Shack and buy two #4 washers and install them under your shaved spacer and see if that will lean out your carb enough. Don't get frustrated, we'll get you through this. Remember what I said about doing one thing at a time.
Oh I know. Frustration is exactly what it is, and not at anybody here by any means! I just know that I'm within "shooting distance" here and just can't get the last bit of it figured out.

Let me run this by you...
I just went outside to the garage and fired the bike up. Let it warm up for several minutes and put it through some paces revving the engine up and down. On decel when I'm approaching the idle range, I'm getting a bit of pop and a wisp of black smoke when its almost all the way down to idle. The black smoke then disappears.
Right now, I'm 1 1/2 turns out on my pilot. Any leaner and she backfires and shoots a little fire, any richer doesn't really seem to do anything other than I figure I'm sooting my plug up.
Would that indicate to you that I need to add more back to the spacer? (Bearing in mind that I am at 1/2 spacer thickness now).
I'm committed to taking this one step at a time, and I think there is something in the idle circuit that is still not quite right.
Guys, bear with me here. I know I'm rehashing the same thing over and over, but I'm just trying to get this thing down perfect (or as close as I can).
Thanks for your help in advance!