Hello friends. I recently installed a new HMF Performance Series Exhaust on “Sonic”, my 01 Raptor 660R. Also rebuilt the carbs and installed an HMF-supplied jet kit, following the HMF jetting recommendations. Just getting it back together. Running stock airbox and filter setup - all cleaned last night. Tonight after changing the oil I started the machine and let it run/idle for about two minutes. Started it with choke on, then quickly went to choke off. Head pipes slowly began to glow orange. Not brightly, but dimly glow. Is this ok? I know I saw a brand new YFZ450 at a dealer glow the pipe bright orange when I idled it for a few mins.