SOHC.co.uk Forums > CB350/400
Engine rebuild Parts list
Bryanj:
At least thats only 2 different case codes to look up, Preston is a bit too far extra to come andcmeasure if for you sorry
davidcumbria:
The difference in shell thickness from one colour to the next is very little and Plastigauge results are not 100% accurate or easy to interpret. If in any doubt go thicker up the colour scale and run in carefully is my advice. If you need a lot of shells cheapest route is to import from impex in Japan.
Dolomite_:
Ive tried to figure it out and looked through other posts. But how do you work out the shells needed from the crankcase codes?
Would these be the ones to use for the new crankshaft?
Laverda Dave:
You need to look at the letter & number combination that is on the edge of the crank webs. These will give you the shell colour to use on a particular journal. They are not stamped on the webs but are printed and are very hard to see. Best way is to wipe the web in petrol as that highlights them.
In my case the web codes were 2, 2A, 2A, 1A, 1A. When you combine these with the codes stamped on the cases AABBA and cross reference with the bearing code table this will give you the shell colour you require for each bearing journal. You can therefore install a second hand crank in your original cases providing you read the crank webs codes correctly. As I said these codes can be almost impossible to see but they are there you just have to use petrol and move the crank around in the light and you will see them.
Do you have a Haynes manual, the bearing code reference chart is in there.
Dolomite_:
Yeah, I've got the Haynes manual and I've also been using the shop manual pfd. I'll try the petrol trick with the new crank. When it arrives. But good to know its hopefully just a case of getting all the codes and working it out.
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