I finally dragged my 750 out of the garage after a year of pure neglect - day job getting in the way as usual 
The last time I rode it it was great, but tick-over was a little erratic, and it tended to start putting out a bit of black smoke on one cylinder after being left at idle for a minute or so.
I dropped the float bowls to find the original plastic float needles still in there. I can't think why I didn't change them when I first rebuilt it, but they're now viton tipped brass numbers, and no more smoke.
This was the bike with totally knackered carbs - until I replaced the throttle needles & jets, it now idles perfectly and pulls cleanly throughout the rev range.
Incidentally, it had a sump-full of oil, and the tank was pretty much empty. I know a lot of folks would have drained it and returned it to the tank, but to be honest I've never felt the need.
I gave it a few slow kicks to move the oil around a little, primed the carbs and it started at the first kick.
Went to the Cafe with Mrs. Bogus on the back, and she's impressed with it. The drum brakes are still bedding in, so no Valentino Rossi late braking. I think that helped 
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