Speed Four Misfire?

Hi guys it's me again.
Going to a fellow bikers funeral and on the way my bike starts ticking over funny. It ticks over fine for a bit then starts firing really fast and going back to normal after. It made moving off a bit hairy as it bites after not responding. I have a friend who thinks it might be the fuel filter. I have a video but can't upload it on here even after trimming it down.
Any advice on this would be greatly appreciated. Thank you.

 

One of my friends suggested that. I've given it a couple of blasts out and filled it again. I think that's seemed to have sorted it for now. I'll definitely look at the filter should the problem come up again. Thanks for the help fella.