Update; weird stuff

Weird stuff but nothing weird in mechanic, neverthelss I was going to the store to get some carburatoor cleaner to put in gaz, had to crank it a few time to start it at home and it was cold( i had clean the air filter) go to the store and when i tried to start it , hit the start button, bang electricity goone, no lights nothing, turn the key , power is back, hit the starter button, same thing no more electricity. turn the key off, turn it on , power is back, i push start it, it starts no problem, mm electrical gremlins... i arrive home, tun it off and turn it on again, start 2 seconds after touching tha start button, last night i verified all connections and wire from battery( and every junction to the main fuse, starter etc...made sure nothing was touching the frame), put the battery on the smart charger , it was telling me it was full... also put a bit of carburator cleaner in the tank, this morning, it starts no problem , like nothing ever happened, went for a ride no trouble, and had to stop a few times to buy some stuff and put more gaz,..started with no problem at all each time.
Really weird.

By the way , i think i got a bad tank of gz from the service station as well.
all connections were ok.

what do you think?

 

Check you battery pole wires if they are not loose... i am pretty sure that is what happened!