SOHC.co.uk Forums > CB500/550
Crank bearings good or bad
McCabe-Thiele (Ted):
I would use Meths though petrol might be okay using a small paint brush rather than a cloth.
Bryanj:
I doubt after this long you will get a colour from them
For new try Yamiya in Japan
Laverda Dave:
And try using a very powerful magnifying glass, you may be lucky and see a fragment of paint colour on the edge of the shell. I have a jeweler's eye glass and it's pretty good.
Acro1985:
I am going to take it to a machine shop and get it all measured properly as I am not confident I am doing it right and the last thing I want to do is install the wrong ones and cause more problems.
Plus from my measurements and very limited understanding of the bearing charts both the crank and big end measurements are outside of spec. Even though despite obvious wear on the big end bearings there was no obvious play in them when bolted to the crank 🤷
Thanks again for all the advice
McCabe-Thiele (Ted):
To compensate for wear you effectively fit thicker bearing shells.
Black is the thickest shell that is made for these old Hondas..
Assuming for the moment you crank mains are within specification.
For your mains as all the casing codes are B it probably had Green or Brown shells fitted originally in the mains.(my B coded mains were brown shells)
Finding a trace of colour would make the starting point much easier.
This photo shows a green colour code on one of my old 400 shells.
Main bearing shell by Macabe Thiele, on Flickr
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