Advice and / or Coffs Area Mechanic

[Little Yellow]

Thank you for the suggestion Mark. 
It does have an aftermarket fuel filter, changed not too long ago, and completely clear. No droplets or globules of water showing. 
I checked, cleaned up and re-gapped the points, but no improvement.
Taking it to see Garry Moody in Bellingen tomorrow morning - off a good recommendation. Fingers crossed for something fairly straightforward!