I have 2001 ds650, I just put on a hmf slip on exhaust and a big gun over rev cdi box, a new tusk battery, and rebuilt the carb and jetted the carb to a 170 jet and the quad starts up fine but keeps dying out. I'm pretty sure there is no air leaks. What can the problem be?

 

Do I need a bigger jet or should I get rid of th cdi and go with the stock one??