I have a 2005 brute force 750. It is carbed. I took it to my mechanic and he said the top end needed to be rebuilt. So we did. New pistons, new front and rear cylinders, rebuilt the carbs, new spark plugs. After getting it back together it won’t start it’s not getting fuel. We bypassed the fuel pump and tried bottle feeding fuel while cranking and still no luck. Any help would be greatly appreciated.