Hi, I have finished my bike this weekend, I have open my starter motor and I have find that the "charcoal" was a bit a tight and soft to connect (we call charcol in frensh I'm not sure for english lol sorry). That why I have nothing at all, it's was not a battery problem. So after fixed this and repair all, the bike is runing again when it's worm whis the magique buton. 
thank for the type of battery I will leave like that for the moment but the next one will be a YTZ 7 S.
thank for the type of battery I will leave like that for the moment but the next one will be a YTZ 7 S.