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Author Topic: Tarnishing header pipe  (Read 2370 times)

Offline Athame57

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Tarnishing header pipe
« on: August 22, 2018, 10:12:26 PM »
I just had my CB400F2 serviced and now I've noticed one of the inside downtubes/Header pipes is showing signs of tarnishing a bit, the others not....your thoughts?
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Offline Nurse Julie

  • 1977 CB550/4 Mongrel Brat. 1974 UK 500/4 K1. Honda CD250u.
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Re: Tarnishing header pipe
« Reply #1 on: August 22, 2018, 10:20:58 PM »
Are they original double skinned or after market single skinned ?
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Offline Athame57

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Re: Tarnishing header pipe
« Reply #2 on: August 23, 2018, 04:35:28 PM »
I don't know. The silencer isn't original though...
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Offline Nurse Julie

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Re: Tarnishing header pipe
« Reply #3 on: August 23, 2018, 04:53:07 PM »
Quote from: Athame57 on August 23, 2018, 04:35:28 PM
I don't know. The silencer isn't original though...
If they are single skinned replicas they tarnish easily anyway but, if what you are saying is that the down pipe wasn't tarnished before you had the bike serviced but, it is tarnished now, then that needs exploring as it may be a sign that one cylinder is running very, very hot.
« Last Edit: August 23, 2018, 04:55:52 PM by Nurse Julie »
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LINK TO MY EBAY PAGE. As many of you know already, I give discount and do post at cost to forum members if you PM me direct.
https://www.ebay.co.uk/sch/julies9731/m.html?item=165142672569&rt=nc&_trksid=p2047675.m3561.l2562

LINK TO MY CB400/4 ENGINE STRIP / ASSESSMENT AND REBUILD...NOW COMPLETE
http://www.sohc.co.uk/index.php/topic,14049.msg112691/topicseen.html#new
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