Cherry Red exhaust

I started my 2014 yz 450f with the choke on an after maybe 30 seconds the exhaust started glowing cherry red, is there something to worry about? Thanks
 
I started my 2014 yz 450f with the choke on an after maybe 30 seconds the exhaust started glowing cherry red, is there something to worry about? Thanks

I agree with Mike, but is is great fun to get your buddy to idle his for awhile in bad light and tell him and help him freakout. If you fatten up the mix via the fuel screw you can get it to glow red for a lonnnnnnnnnnnnng ways.
 
Ya know, my wr and crf would do the glowy header thingy after idling for extended periods of time, the kx has not done it that I've noticed, and I start it up and let it idle on the stand a lot because I really want to ride.
 
I don't know anyone that falls for looking for airleaks and needing bigger and bigger pilot jets anymore. So the entertainment is down some.
 
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