Could be a coil try swapping side to side and see if the problem moves with the coil. Since the bike sat for a bit like I told you when we were PMing back and forth can't hurt to open the carbs and clean them checking that air will flow through all the circuits pilot, mid , main. Could pull the top covers off too and have a quick look at the rubber diaphrams that lift the slides.

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Eat right ,Exercise ,Stay fit, Die Anyway!