Hello all. I'm new to the TT forums, however, I am not a virgin forum user. I have tried to look my problem up using the search feature but it doesn't seam to be working. Anyways back to my issue. I have a 2002 YZ 426 that I just finished referbishing. Upon starting the bike after the rebuild I have noticed that the header gets red hot. It is important to note that I replaced both cams with the stage 1 Hot Cams and installed a complely new exhaust from FMF, Power Bomb Header and Power Core 4 silencer. Does anyone have any ideas of what may be causing the header to get so hot? Thanks in advance for your help.