Charging weakly

Hello.
Mine friends 2008 Yamaha grizzly 700 not charging properly. We were riding for 1hour and then he was going slow then stopped and it stalled. And then when he tried to start it the starter relay was like clicking fast (cik cik cik cik) and it wont start. I towed him home. Turned on charged battery and it fires right up.Then we start and remove negative battery from battery and when we turn lights on it stalls instantly. So i thought maybe lights are shorting something. Turned off one light connector, started the bike and when i turn the light on it runs but really Bad and engine light turns on. So i tried checking stator by checking connector with 3 white wires and it shows 2.4-2.6 something like that. So what thats supposed to mean? Stator is Bad or almost Bad? And when i checked continuity ( that thing where you touch multi meter wires together you hear peep) so when i checked on white wires every time i hear peeep. And one think that is strange that its always showing same on all wires. And forgot the real numbers it was 2.4 or 0.24 but something like that.