Live to Ride...Ride to Eat

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That's the ticket Suhawk, by the time the icecream filled half the screen i could almost taste it, nice shots from you!

If you wanted to test the capacitor(s) all you need to do is disconnect them, idle the bike and if it makes no difference it's not the capacitors, my 1977 cap's still have the same capacity and are fine so far.
Maybe look at water in the fuel or obstruction in the idle jets, it's in very nice shape though, best of luck.