Hi I’m having a similar problem. I left bike standing over winter, forgot to put the trickle charger on. Obviously didn’t start so put trickle charger in for about 3 days. Then it fired up first time. Rode it a few times to work and back. Only 8 miles each way.
Went to try it the other morning and nothing. Fuel pump went through sequence then when trying to fire up I just get a clicking sound.
I’ve currently got the tank lifted to get at the battery terminals to try and test the volts when/if I get it started. Before I tried to fire her up earlier I had about 12.6V across battery terminals. Not sure if that’s great or not. Could ideally do with someone stating the voltage to expect when key in off position, when bike has started and idling before the bike reaches temp and then at different revs. Also, if anyone knows how to test if the regulator/rectifier that would be great.