Pipe Hot!

I have a 03 YZ450 and when I start the bike the head pipe gets glowing hot right away.

Can someone tell me what is going on. I checked the carb jetting, the valve lash and the coolant.

The weep hole was leaking so I changed out the water pump seals.

Thanks!

I have a 03 YZ450 and when I start the bike the head pipe gets glowing hot right away.

This is Normal, not to worry.

Jason

Double check the pilot circuit. Might be lean.

This is Normal, not to worry.

Jason

I thought so to until I talk to a bubby that has the same bike and he said nope!

Double check the pilot circuit. Might be lean.

It's fine.

Theres a sticky on this somewhere. Its normal.

The walls of the exhaust are so thin that at a stand still and in the dark it will glow red from the heat. It is really nothing to worry about. Very normal. Go ride.

and yes it's in the stickies somewhere.

The walls of the exhaust are so thin that at a stand still and in the dark it will glow red from the heat. It is really nothing to worry about. Very normal. Go ride.

and yes it's in the stickies somewhere.

So you would say in 5.5 sec. the pipe is going to be red big time!

I have a 03 YZ450 and when I start the bike the head pipe gets glowing hot right away.

Can someone tell me what is going on. I checked the carb jetting, the valve lash and the coolant.

The weep hole was leaking so I changed out the water pump seals.

Thanks!

Christine kudos to you for owning a 03....the most brutle YZF450 :moon:

Glowing headpipe is normal....great for marshmellow cooking :cheers:

Yup, normal.

Where's Gray when we need him?

I went and looked at a really nice 2004 YZ450F for $1,800 Canadian, and seen the header pipe glowing RED HOT, this was outside in the dark so it scared the heck out of me...... I almost left and didn't buy it! I ended up taking it any way and I learned that evening here on Thumper Talk that it is normal. Love this bike now!

Thin wall tubing... Ign. timing is some what retarded at idle creating a bit more heat that at a fast idle (where it starts to advance) Mine does it (also 03) How does the bike run? If it performs good and does't over heat (push coolant out) then why get upset ...I have read at least 5 guys on this thread that say it's normal?

Where's Gray when we need him?
Why do you need me?
Why do you need me?
Because we always enjoy seeing the shopping cart pic :moon:

rocket-cart_sm.jpg

this one ????? sorry gray had to...

Edited by jhendr3702
rocket-cart_sm.jpg

this one ????? sorry gray had to...

Nice! But it looks like it could be running a little lean :moon:

don't touch the pipe, trust me

Nice! But it looks like it could be running a little lean :moon:

naaa... i have it on good authority it is normal...

Because we always enjoy seeing the shopping cart pic :moon:

Exactly.

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