I just installed my Bassani Pro-Street pipes I got for Christmas and I need some help. I can feel a major loss of low end power. I have not rejetted the carb (still stock settings) and I do have the SE Air cleaner assembly. It almost feels like on take-off it is sputtering and running kind of rough. Is this a normal problem...how do I remedy it? This NEVER happened with my unbaffled longshots.