SOHC.co.uk Forums > CB500/550

Refinishing exhaust flanges and collars

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BigAl (Alan):
I had some exhaust flanges and other parts re-chromed by Mark at RS, very pleased with the results. Photo attached

AshimotoK0:

--- Quote from: Oddjob on July 08, 2015, 01:42:51 AM ---Yeah mine looked like that Al and they were also done by RS but in the early 80s when chroming was so much better than it is today.

However due to the rough casting it leaves small holes in the chrome and that's where the water etc gets in, pretty soon it's not looking quite as pretty.

--- End quote ---

Agree .. I got a NOS pair for one of my  250's and you can see, after shelf-only  storage for 30 odd years,  that there's slight rust build up in the 'valleys' where the throwing power of the plating process  is poorer and also where it's hard to reach with a polisher/abrader. I think we have to be fair to Mark at RS here, that this is a very  difficult item to plate and most (if not all ) chromers will struggle with this one, as no doubt Honda did back in the day, and they were starting with a freshly prepared casting.

BTW someone I work with says his dad is a chromer in Hull and that new EU regulation is coming in, which almost outlaws even the 'safer' conventional tri-valent chrome plating (unless you spend oodles on new fancy  plant). David Silver also told us that about 18 months ago. Perhaps, the only way round it is to stockpile the chemicals before the laws come in.

Ash

Spitfire:
RS re chromed all my clamps in 2007, but looking at them this year some of the chrome is peeling off, one was particularly bad so I ordered a new one from DSS which was already rusting before I fitted it. So rather than go down the same route again I just used high temp aluminium paint on the troughs and left the raised parts chrome, not perfect but at least no rust is visible.

Cheers

Dennis

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