Just changed my oil for the first time on my 426 and I noticed that one of the header bolts (left side if sitting on bike) is broken. I bought the bike used so I don't know how long its been that way. Is this a problem I should fix quick, or not a big deal? I tightened the other bolt good. I also noticed that when I started the engine, the exhaust (header) got red hot....I did this at night, so I guess it's normal to see it red, right? Thanks