F1 Light is on :( help please

[bazman]

HI guys - went to ride the bike today after it had been sitting for some months....
Boc

I'm no expert Boc (far from it, actually!!) but if it's been sitting for "some months" (...2,3,4,6 months?!?) very good chance your fuel has turned to shite!!
....ya might wanna drain it all out and whack some fresh stuff in (some injector cleaner might help too!)