Went for a ride yesterday and the bike started to misfire while accelerating or pulling away from lights. Weird thing was it wasn’t doing it all the time.
When riding it would randomly sound like it was running on 3 cylinders. Accelerating would sometimes cure it, sometimes not. Then it would be back to 4 again. Pulling away from lights and it was lumpy again but then cleared and ran fine. revving the bike at standstill wasn’t an issue and it rev’ed fine with no splutters??

Does this sound like a vacuum hose issue or something else? As it’s fine at standstill i’m Not sure where to start????

Any chance the misfire starts around 5000rpm, have you checked the battery voltage at >5000rpm ?