Aye Dan,
Usual problem with a machine that is laid up with manky or ethanol fuel and no stabiliser mixed through it. After my 'incident' I drained Sally's tank and sucked all remaining vestiges of fuel from the two pannier parts of the tank with a large syringe and pipe (See previous posts on lamb feeding syringes!).

Compressed air through all the little orifices, having removed the diaphragms. Cotton buds, with paper sticks(

), wooden cocktail sticks and brake cleaner for loosening the rust and other detritous. Brake cleaner may also perish the diaphragms (!).

YOU HAVE BEEN WARNED!
Again, I use the 'ArmorAll' on the diaphragms and massage it in with my fingers, gently! Watch your nails if you play guitar!

Wipe any surplus off after leaving for a few hours. Re-assemble with care and a little light machine oil (3in1) on all pivots, springs etc.
Re-install and before connecting up the feed from the petrol tap, insert a small filter between the tap and the carb, it will save you more grief, as will draining your tank if you are going to keep the bike off the road for more than 8 weeks; especially when condensation is likely to form in the tank.
I attach an image of the contents of the pannier parts of the tank of a Mono SRX that I unfortunately purchased!

Good health and my regards, Bill
[attachment deleted by admin]