Bazzaz is the only thing I would use other then a power commander. They are a waste of money if your stock or just a slip on/air filter from a performance aspect if your broke. If not then every little bit of help is worth it to some people. As for keeping the correct a/f ratio in the engine and engine response around town, they are a great idea and well worth the money unless again your broke. I always find other things to spend the money on when I go to upgrade my bike.....

 

Like a Naked Girl Tank Protector???