Hello, Yesterday was my first decent ride on my wr450f. It has a FMF Factory 4 with a Titanium header, It gets really hot, At night it will glow red. I am worried that if its getting that hot that if I am to come off a rock may crush the header? Also when I turn it off to have a breather it's bubbling back into the overflow bottle, Is that normal? Happens for about 30 od seconds then stops. Sorry for all the questions but just getting into these big bad arse bikes haha. Cheers, Ethan.