I installed a Cobra FI2000 on my 2006 VTX 1800c I also have the Cobra Speedster Longs and stock air cleaner. I didn't change the original settings and it seemed to work just fine. Now after 2000 miles after I start the motor to let it warm up it pops for about 5 minutes and sometimes it keeps on popping for quite a while. Performance seems OK but I wonder if there;s something amiss. Anybody got one of these animals? had this problem too? what did you do to "Stop the Pop."