On the weekend I was adjusting, cleaining and lubing my chain but it is no good so have ordered a new one, the bike started on the centre stand but was making a racket because of tight spots in the chain (only when I put it in gear). Now it simply wont start, keeps winding over till the battery is flat

I have checked the main fuses (under the seat). Also of note is that I replaced the stator recently but I have ridden about 200kms since then with no issues.
Any suggestions about where to start looking - I was going to start by pulling each of the coil packs out and checking for spark but I really doubt theis is the problem. I am thinking more likely it is some hidden fuse or relay that may be gone.
Any suggestions appreciated and all ridicule accepted!
Thanks
Ben