Honda-SOHC
SOHC.co.uk Forums => CB350/400 => Topic started by: 400 Cafe Racer on August 06, 2021, 09:38:55 PM
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Hi, NOW SOLD
If you are doing an Engine rebuild these may save you some serious cash. Purchased new from DS this week, only 2 removed from packets to test crank mains gap using Plastiguage. This was to give me a datum for measurement as my original shells were without any colours.
Members can have at half price + postage, before I offer on ebay.
See full deails on Member 4 Sales.
Hope this helps one of you Guys.
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Out of interest what was the final colour code outcome for the shells that give you the right clearance?
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As I said Ted, there was no colours on any of the existing shells. It was 5 sequences of Plastiguage measurement, taking readings each time and assessing where I needed to add or subtract clearance when I had the next set of results, non ended up in their original positions!!!. All the shells are run in with a light polish and I have ended up with all journals at 2thou clearance, which would have been 1.5thou on virgin shells. These clearances will allow full use of the rev range without concern.
The crankshaft is excellent, just that the 1 and 5 journals were too loose, losing some oil pressure I would imagine, and the centre 3 rather too small on clearance.
Very happy now its sorted and on its way back together.
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As I said Ted, there was no colours on any of the existing shells. It was 5 sequences of Plastiguage measurement, taking readings each time and assessing where I needed to add or subtract clearance when I had the next set of results, non ended up in their original positions!!!. All the shells are run in with a light polish and I have ended up with all journals at 2thou clearance, which would have been 1.5thou on virgin shells. These clearances will allow full use of the rev range without concern.
The crankshaft is excellent, just that the 1 and 5 journals were too loose, losing some oil pressure I would imagine, and the centre 3 rather too small on clearance.
Very happy now its sorted and on its way back together.
Sorry Dennis I missed your other post where you mentioned the shell order changes to get the right clearances. Makes you wonder if someone just got mixed up with the parts when they built it up - I could understand getting the number order backwards but yours was worse by the sounds of it. I know when I was taking my new shells out of the packets and placed them in the crank I was very careful to get them in the right order - I even marked the casing with a felt pen so 1 & 5 were the right way around when the top casing was upside down!