Bike will not crank over

[BarbasLife]

First of all Hello everyone I'm new here my name is Mike aka barbas I need help with my gz250. Let me start from the beginning so my bike started good ran great one day I went to start it and the starter was going bike wanted to start bit kept dieyin then the starter stopped working I figured I burned the starter Ialso noticed I did not have gas that's why it was not starting. By then it was too late I thought my starter was burned so I got another starter put it in and my bike will not start just clicks once so I figured my battery was dead I bought a charger charged it still the same click so then I bought a new battery still the same click I also notice my lights dim badly when it clicks. I got a new starter relay thinking it was the problem still just a click I tried to bypass the clutch safety switch n kickstand one still just a click.its driving me nuts I can't figure it out. Yesterday I noticed that it's a click from the starter relay and I noticed the starter wants to turn but is weak. Makes no sense I tried looking for a bad ground or a bad wire nothing was found. I also took jumper wires used them as temporary ground from negative to motor and from motor to frame to see if it was ground problem nothing please tell me if you guys have any ideas thank you in advance. I do have a YouTube channel I'm gonna post a video soon. My channels name is BarbasLife