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Wow! Had the bike up on stand just listening to engine purr after doing doo hickey upgrade on my 08 with 15500 miles,shop was kind of dim and I noticed the header pipe had a low red glow .I had backed the air screw out 2 and a quarter turns miles ago and adjusted the valves,other than that it has had no other mods.Can't believe I've never noticed that before even though the header has always looked like it ran warm.After looking at other threads,it's not that uncommon,but not comforting to me.I'm going to try backing the air screw out a little more.The bike has always ran great.I'm laughing now,but my first thought was how could have changing that balancer chain adjuster do that!
 

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Wow! Had the bike up on stand just listening to engine purr after doing doo hickey upgrade on my 08 with 15500 miles,shop was kind of dim and I noticed the header pipe had a low red glow .I had backed the air screw out 2 and a quarter turns miles ago and adjusted the valves,other than that it has had no other mods.Can't believe I've never noticed that before even though the header has always looked like it ran warm.After looking at other threads,it's not that uncommon,but not comforting to me.I'm going to try backing the air screw out a little more.The bike has always ran great.I'm laughing now,but my first thought was how could have changing that balancer chain adjuster do that!

Yea just sitting there the header/bike will get hot after awhile, needs air going over the radiators to keep it cool. The air injection makes the exhaust hotter also.
 

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Hot pipe

Check the 2 acorn nuts holding the header flange with a torque wrench, they can loosen up and cause air leaks leading to (red)hot pipes.
 

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Damn! I just had this happen less than an hour ago (no doo mod, just letting bike warm up after sitting for a couple weeks). I came on here to see if I had something getting ready to go into thermal meltdown. Glad to hear (I think?) it's to be expected. Phew!!

I'll check the acorn nuts on mine as well... as soon as it quits snowing and I get the balls to fire it up again. :11a:
 

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Any four stroke that doesn't have a double walled header pipe will glow red when idling. The exhaust has several hundred degree gases coming out of it, so it's going to glow. Turn on an electric range, coils glow the same way.
 
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