Just curious if anyone has any info on where to start with jetting on a 09 450 with a fmf 4.1 silencer w power bomb header. I ride at 1000ft, Bike is completly stock except for pipe. Need a starting point . Looked on fmf website and they have nothing . Called them and best the guy i could talk to could give me was info for a 04 450f. Also has anyone tried the moto tassinari airforce tuneable stacks and are they worth the money or not ? or are they a bigger pain than what they worth ?