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How long is exhaust header?

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G-Man
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Post by G-Man » Sun Nov 07, 2010 3:06 am

That's really interesting. I got a set of old pipes to re-chrome and when I laid them on the bench at the chromers, one was longer than the other so I decided to take them back home. The mufflers must be different lengths then or am I missing something else?

I have a definitely very original set of pipes off my C72 Dream do I will carefully strip them down and take some measurements.

G
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G-Man
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Post by G-Man » Sun Nov 07, 2010 3:35 am

This was the 'pair' of C72 pipes I took to the chromers. I would be interested if anyone can confirm (or otherwise) these measurements. I concluded they were not a pair but maybe....

G
Attachments
C72 Pipes 1.jpg
C72 Pipes 2.jpg
'60 C77 '60 C72 '62 C72 Dream '63 CL72
'61 CB72 '64 CB77 '65 CB160
'66 Matchless 350 '67 CL77
'67 S90 '77 CB400F

LOUD MOUSE
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Post by LOUD MOUSE » Sun Nov 07, 2010 9:06 am

The longer one is for the left side. ..........lm

As i know it the left side header pipe will be longer than the right side. ...............lm


G-Man wrote:This was the 'pair' of C72 pipes I took to the chromers. I would be interested if anyone can confirm (or otherwise) these measurements. I concluded they were not a pair but maybe....

G

48lesco
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Post by 48lesco » Sun Nov 07, 2010 10:08 am

Forget what I said above, I found my notes from when I put the exhaust back together a couple of years ago and the LEFT pipe was "slightly" longer (my apologies, always go by what LM says). This morning I measured the distance from the flat front of the crankcase where the starter mounts to the leading edge of the mufflers and the right muffler is mounted about 1/4" further forward which makes sense with respect to the right pipe being shorter. Also from my notes, the left pipe was stamped "L" and the right pipe was stamped "S".

So, some philosophical questions still remain:

1) Why did Honda mount the left muffler slightly further aft?
2) Why is the right pipe stamped "S"?

Guru's: If you don't know, make something up so we can rest.

mike1969
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exhaust

Post by mike1969 » Sun Nov 07, 2010 10:34 am

From what i've read "S" is short for SUD meaning "south".

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davomoto
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Post by davomoto » Sun Nov 07, 2010 10:52 am

Obviously, the S stands for short! :-)

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48lesco
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Post by 48lesco » Sun Nov 07, 2010 5:44 pm

Darnit I wish I'd thought of that... That's why you're an "expert." Now why is lefty further back?

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