SOHC.co.uk Forums > CB350/400

Tarnishing header pipe

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Athame57:
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?

Nurse Julie:
Are they original double skinned or after market single skinned ?

Athame57:
I don't know. The silencer isn't original though...

Nurse Julie:

--- Quote from: Athame57 on August 23, 2018, 04:35:28 PM ---I don't know. The silencer isn't original though...

--- End quote ---
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.

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