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Gold colored plating on motorcycle exhaust pipes and fork tubes


Q. I see a gold colored plating on some motorcycle exhaust pipes as well as on some front fork tubes. What is this plating? How is it applied? What properties does it possess (hardness, resistance to corrosion, discoloration)?

Dennis Finch
- Katy, Texas

May 28, 2009

A. Hi Dennis,

Possibly they applied Titanium Nitride coating. (TiN coating)

regards, John

- The Netherlands

Motorcycle Exhaust - titanium nitride over raw steel?

September 7, 2016

Q. I have a Harley and want the exhaust to have a gold color, like drill bits coated with titanium nitride. Does anyone have any experience with this kind of coating on high temp surfaces such as a motorcycle exhausr? Any tips on surface prep if you think the coating will hold out and not bubble or discolor? And do you know of any other viable coatings which will give me a color other than silver or black?

David Krause
- Ocean Springs, Mississippi

September 7, 2016

A. TiN PVD will hold up on your exhaust pipes, but you might not be able to get it done. PVD is a bulk process, and in general no one in the business will process parts for an individual. Second, the exhaust must be new -- no one will chance putting a used exhaust in their chamber. Third, TiN does not give you very good corrosion protection. No problem if the parts are stainless steel, but if they are steel they should be nickel/chrome plated before PVD coating.

jim treglio portrait
Jim Treglio -
PVD Consultant & Wine Lover - San Diego,

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