How hot is hot?

I have a 2000 Wr400. Purchased a few months ago. Replaced the stock muffler, which was gutted, with a IDS Supertrapp. I am currently running 16 rings. It starts and runs great. I have noticed when it gets dark outside the head pipe has a slight red glow. I checked the spark plug and it looks good. Is the engine running too lean? :cry: Should I rejet it? We are just a couple of hundred feet above sea level.

Thanks

WH

Normal, normal, normal :cry:

Youre fine - that is normal. My bike, wr450 does the same thing. Once you start moving it will cool down a bit.

Perfectly normal.

The head pipe is only a single wall pipe to save weight. Typically, most four-stroke head pipes are dual wall, so you don't see it glowing.

I noticed the same "problem", the pipe was badly hit and I thought it was overheating from reduced flow...fixed the problem, but pipe still glowing :cry:, untill I was told it is normal

at least pipe looks good now :cry:

Thanks

Thanks

well with all that high compression and fire coming out of that pipe yes of course it's going to glow red hot.

not only is it perfectly normal but its a pretty cool feature IMO.

I get a kick out of firing it up at night and showing off my glowing pipe :cry::cry:

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