SOHC.co.uk Forums > CB350/400
400 four main bearings - will need replacement STD bearings.
McCabe-Thiele (Ted):
I have seperated the crank case halves - I do not think it has been split before but who knows. A very thin white adhesive that pulls off easily was present. The main bearings are marked D6H-A STD.
Do these look like originals?
The crank journals on the mains look good - they are unmarked.
Where is the best place to purchase?
.main bearing shell by Macabe Thiele, on Flickr
.rear of main shell by Macabe Thiele, on Flickr
Bryanj:
Like ken says numbers mean nowt, you need to measure the journals VERY accurately to see what size they are andcross refer to tables in manual
McCabe-Thiele (Ted):
So it's not a straight DS part then!
McCabe-Thiele (Ted):
--- Quote from: Oddjob on March 20, 2021, 06:48:06 PM ---No, you need to identify the colour used, there are 5 colours for the 400, black, green, brown, yellow and the 400 has a blue that most don't have.
As I previously said, see if any remnant of the old colours are still on the edge of the shell, green shows up pretty well for instance.
Check the crank journals for scoring, with the state of that bearing I'd be worried about the journals, run a fingernail across it and see if you can feel anything.
--- End quote ---
The journals look perfect IMHO not a groove or anything. No step with fingernail. Be dammed if I can see any colour codes I will look again with a light & magnifying glass. Are the big ends the same where STD does not mean anything?
Bryanj:
Big ends may be ok, that damage could be dirty oil infrequently changed but who knows
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