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Author Topic: Blue pipes on 400F  (Read 976 times)

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Offline RichM

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Blue pipes on 400F
« on: February 24, 2014, 04:06:18 PM »
Hi Guys. I'm new to the forum and am reliving a bit of my childhood by purchasing two 1975 CB400F's. One is a 2,100 mile "display piece". My concern however is the blued pipes. That would seem to indicate a lean burn situation. Can anyone point me in the right direction- ie. don't ride it until you.....
The second 400 I purchased is a 20K mile "fixer upper" that I'm sure I'll be on the forum about.
Thank you in advance for any help you can provide!
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1981 Honda Goldwing
1999 Honda Valkyrie
1975 Honda CB400F (X3)

Offline brooze72

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Re: Blue pipes on 400F
« Reply #1 on: February 24, 2014, 05:20:04 PM »
Welcome Rich.  Yes, it can be an indication of a lean condition.  A 3k tune up & carb sync would probably be advised, check the plugs & carbs (for jet size, clip position, etc) vs stock.  Are the headers/pipes/muffs  original?  Honda used mostly double wall headers, so it's not as common to blue as easily as some aftermarket stuff (or golden like stainless does) or like Brit bikes do.
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1981 CB650C - new project

Offline LesterPiglet

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Re: Blue pipes on 400F
« Reply #2 on: February 24, 2014, 05:24:22 PM »
Once they are blue they stay blue.   :(
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'Then' and 'than' are completely different words and have completely different meanings. Same with 'of' and 'have'. Set and sit. There, their and they're. Draw and drawer. Could care less/couldn't care less. Bought/brought FFS.


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Offline RichM

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Re: Blue pipes on 400F
« Reply #3 on: February 25, 2014, 04:03:39 AM »
Thanks for the reply guys. This bike is supposed to be bone stock (and it looks to be- even the tires). I was advised to maybe try some Yamalube carb cleaner in case the jets have some clogging. Suggestions? Also, I understand that there's no way to improve the blue color short of a re-chrome. That's a shame since the bike is otherwise perfect.
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1981 Honda Goldwing
1999 Honda Valkyrie
1975 Honda CB400F (X3)

Offline Sami1987

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Re: Blue pipes on 400F
« Reply #4 on: February 25, 2014, 06:49:20 AM »
Blue-away works very well on
discolored pipes. I have used
it for years.
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Offline LesterPiglet

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Re: Blue pipes on 400F
« Reply #5 on: February 25, 2014, 07:25:49 AM »
Quote from: Sami1987 on February 25, 2014, 06:49:20 AM
Blue-away works very well on
discolored pipes. I have used
it for years.
Do you have a link?
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'Then' and 'than' are completely different words and have completely different meanings. Same with 'of' and 'have'. Set and sit. There, their and they're. Draw and drawer. Could care less/couldn't care less. Bought/brought FFS.


Les Ross.            Certified by a Professional

Offline martin99

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Re: Blue pipes on 400F
« Reply #6 on: February 25, 2014, 12:15:35 PM »
Blue-away is sold by Frost restoration in the uk

http://www.frost.co.uk/blue-away-metal-cleaner.html

The Harley guys apparently swear by Blue-Job

http://www.blue-job.com/
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Build threads:
77 750F2 Refresh Project http://forums.sohc4.net/index.php?topic=144075.0
TRIBSA http://forums.sohc4.net/index.php/topic,160296.0.html

1977 CB750 F2
1958 Norton Model 99
2011 Triumph Street Triple 675

Offline LesterPiglet

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Re: Blue pipes on 400F
« Reply #7 on: February 25, 2014, 12:27:15 PM »
Thanks, I'll have to give it a go.
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'Then' and 'than' are completely different words and have completely different meanings. Same with 'of' and 'have'. Set and sit. There, their and they're. Draw and drawer. Could care less/couldn't care less. Bought/brought FFS.


Les Ross.            Certified by a Professional

Offline LesterPiglet

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Re: Blue pipes on 400F
« Reply #8 on: February 25, 2014, 12:47:53 PM »
Bloody expensive.   :-\
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'Then' and 'than' are completely different words and have completely different meanings. Same with 'of' and 'have'. Set and sit. There, their and they're. Draw and drawer. Could care less/couldn't care less. Bought/brought FFS.


Les Ross.            Certified by a Professional

Offline martin99

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Re: Blue pipes on 400F
« Reply #9 on: February 25, 2014, 01:18:47 PM »
Quote from: LesterPiglet on February 25, 2014, 12:47:53 PM
Bloody expensive.   :-\

Yeah, that's why my bikes still have blue pipes!
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Build threads:
77 750F2 Refresh Project http://forums.sohc4.net/index.php?topic=144075.0
TRIBSA http://forums.sohc4.net/index.php/topic,160296.0.html

1977 CB750 F2
1958 Norton Model 99
2011 Triumph Street Triple 675

Offline fmctm1sw

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Re: Blue pipes on 400F
« Reply #10 on: February 25, 2014, 05:14:36 PM »
As mentioned, there's some stuff out there.  Here's my flitz thread: http://forums.sohc4.net/index.php?topic=131549.msg1468098#msg1468098  This stuff works wonders on yellow headlights too.  You should see the headlights on my prius ....
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Quote from: 754
Dude is that a tire ? or an O-ring..??

Quote from: inkscars
This is not a pod thread
This is not a #$%* on my vacuum gauges thread
This is a help or GTFO thread.

1973 CB350F
1973 CB350G
1975 CB550K
1983 GL650I
1973 CB750K3 (http://forums.sohc4.net/index.php?topic=92888.0)
1984 Kawasaki KLT-250 (AKA 3 wheeler of death)
1994 Honda TRX300
1999 Honda TRX250

Offline calj737

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Re: Blue pipes on 400F
« Reply #11 on: February 25, 2014, 05:16:03 PM »
I have. They're in my rear view mirror!

 8) 8)
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"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis
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