I have it running 'better' now.....Red Line SI-1 fuel cleaner (recommended by Tyler) arrived. I will start using.
Wondering if it's worth trying to remove some of the carbon build up that seems to be in the cylinder & piston head? A mechanical disassembly would seem a tad much - but I've read spraying carb cleaner down sparkplug hole, allowing to soak can loosen and assist removing it.
Any thoughts on if it's worth removing the carbon & if so how to do welcomed. :-)