keeps stalling
 

Well the problem just started the other day. I was sitting in traffic and it suddenly stalled out. I started it and rode a little, the next light i stopped and it stalled again. I pulled into a parking lot and let it sit for a little bit. I then tryed restarting and and the battery was dead. So i went and got a new battery, which lucky for me was in walking distance. I replaced it and everything seemed fine. until I started riding again. I let it idle and again stalled out. I decided to test it and it starts to do this only when temps reach 195-200 and up. I put more water in the reverse and I''m still having issues. Me and my dad just did a coolant flush over the winter so i doubt thats the problem. the only other thing i can think of is I put a k&n air filter in and i also have a slip on. would the new filter cause this?

edit. i just saw a post a few pages back that may have my answer. I suppose there could be air left in it causing this?