hot pipe!

I have a canadian wr426 and have talked to a few people now about my hot pipe. i mean, if i let her idle for 2 or 3 minutes on warm up in a dimly lit room, the first 8 inches or so coming out of the cylinder will glow a cherry red. Everyone so far has said that it is normal but i just figured that i would run it by you guys and get some more opinions. is just seams that if it is that freakin hot, i wonder what my valves and pistons look like when she is running. oh ya, my friend has a yz250f and his pipe looks completely normal (like new) where mine is a blueish purple for the first 8 inches. Also when my bike was new the pipe was silver, now the whole thing is gold. Could it be running a little lean on idle causing it to be very hot? any suggestions on this would be greatly apreciated. Thax Matt.


Northernryder, this subject has come up before. The header pipe on a WR400/426 can glow red hot. Not to worry this is normal. When I first noticed it on my WR I freaked also. But, after reading several post on the subject and having ridden my bike for well over a year now with zero problems I just came to realize that I am riding a fire breathing dragon! :) Scan the archives. I'm pretty sure you will find some discussion about this. Thanks, P

Note: I also have the Canadian model. :D

[This message has been edited by PMAUST (edited August 26, 2001).]

Like Pmaust I too have the Canadian scoot, the only time that I notice the glow is at night. Me and most of my friends have stock jetting on our WR's. On our last outing to hell and back it was a funny sight to see 4 Yahaha's in a row with all orange head pipes crusin down a tight trail. None of us have had any signs of valve damage or other problems. I ride at sealevel with stock jetting and stock timing. see ya

I have a canadian '01 WR250, and my headpipe glows as well. Yesterday, I rode in the rain, and 15 minutes after I stopped, raindrops landing on the silencer disappeared instantly...just made little hiss noises.

It appears that it's just a fact of life. But I think we can all agree, you don't want to get pinned under this sucker!

Tex Labo

'01 WR250

'01 DRZ-E (for sale)

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now