I just purchased a 99 YZ400F this past weekend. Its a very low-hour bike, all stock except for front/rear springs. I have been reading many of the post in this forum and it is calming my fears about the bike. I have the typical flaming hot header pipe and some exhaust popping on deceleration (very little, but some). The bike runs great and has plenty of power. I switched from a 2-stroke 250 to this so I could ride more with my young son and not worry about fouling plugs. The problem I have now is that when I am putting around with him, it feels like there is a campfire between my legs. Should I worry about overheating this thing if I am riding around in 1st gear with my kid?