SOHC.co.uk Forums > CB500/550

Were 500 casings originally polished alloy or sprayed with Aluminium paint?

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Sesman:
Like I said, my example may only be relevant to the 77 F2.

Oddjob:

--- Quote from: Sesman on October 24, 2022, 11:23:45 AM ---Like I said, my example may only be relevant to the 77 F2.

--- End quote ---

No same finish was applied.

Trigger:
I think you need a eye test Ken, if you think that the same paint is used across the Honda for the past 60 years :o
The CB750 changed from 1969 to 1979 and in the 80's Honda used a lot of ceramic paint on engine casings which the first i ever see on a SOHC was a CB750F2 ;)

Do you think that this is the same finish in the picture between a original CB750K1 clutch cover and a CD250 engine  ::)


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Oddjob:

--- Quote from: Oddjob on October 22, 2022, 02:34:10 PM --- the casings are 100% painted and lacquered, Honda are still doing this to this day,  I've got a grab rail off a VT1100 that you can just make them out and that's after being sanded really flat, there are cavities, where an air bubble sat on the surface, paint fills those in, polishing doesn't.

--- End quote ---

I didn't say they were using it on all models Graham, I just said they were still using it. My CB1300 for instance has the same finish on the clutch cover.



Does the finish on those look familiar?

Or do the grab rails and engine covers on this VT1100 look the same?



You really don't like admitting you're wrong on this.

Cappodimonte:
Gentlemen, let us not fall out over such ab issue, just to put my two pen’orth in. Take a vintage British bike of any make and the engine cases are of Aluminium which respond to polishing up to mirror finish and do not readily corrode. Japanese bikes of any make or marque use Mazak or Zamak which without paint protection will bubble and corrode really quickly. Even with paint protection the underlying material can bubble and ‘rust’ by which I mean it returns to a white powdery substance.
Just to put this into perspective, I have a Mazda MX5 which has an aluminium bonnet, this has a couple of raised nodules which have lifted the paint but not broken it, in part due to poor initial preparation, followed by weathering which exacerbates the problem.

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