Blackhawk28

I see that you have an 01 VFR with a slip-on and a k&n air filter... My question is with these two modifications did you have to get a power commander to get the bike running smooth? I bought an 01 VFR that had a yosh slip-on and I recently installed a k&n air filter and my bike appeared to run well with it. I recently put in a new battery that has more CAA than the stock and the bike appeared to run well. However, the other day I was riding and my bike seem like it was hesitating a bit... Not sure what the problem might be.. I notice that the exhaust was very warm. I flushed the coolant as a precaution but I still don't know what's wrong. Could the bike be running to rich or lean?? Any insight would be appreciated.
Thanks