So here the new i did the honda civic batteries to the system and it solve all trouble. Plenty of amp for starting,utv now stay between 12.5 and 14 volt while dual fan and light is on ,the honda civic batteries almost fit in the OEM batterie box but i prefered to keep the original one connected to the other batterie,i placed it in the back but when i have time i will make a new batterie box to put in 2 honda Civic batteries or just a 1095cca batteries at the Factory place.
Fan now run less and really cool the coolant in the cooling system ,they have the required amperage to make it perform as it suposed to be . I have rewired the starter whit top quality wire and top quality connector so now it start quite fast(old wire was inside corrosion)
The charging system work really well now they keep batterie between 12.4 and 13.3 volt when all electric is working instead of before so make this mod if you can.
Something i noticed is that the exhaust system i not more glowing hard red when running what is quite really good because when the batteries come low due to the overcharge on the electrical system the performance was decreasing due to the lack of amperage and voltage to make good read from the sensor and keep the fuel pump running at the psi it supose to be running i am now able to race against against brute force 750 and renegade 800 on gravel road hehe 😁 and its a fully bone stock unit ,no mods at all ecxept batterie upgrade