SOHC.co.uk Forums > CB350/400

Oil Pump Washer?

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Deano400:
Yesterday when I went to use my ultrasonic bath I found a washer in the bottom. Having given it some thought I think it belongs to the oil pump. The thing is I don't remember seeing it when I cleaned the pump. So pump is back off the bike and I think I can see where it should go, position A in the picture, but could be position B. Or I suppose it could be neither. I would appreciate it if someone could confirm either way. TIA.

Bryanj:
Have you recently washed out the filter housing? Without sizes looks a bit like the washer between filter and spring.

Nurse Julie:
Can you measure it John ?. I can then see if it's the same size as any that are in the CB400/4 oil pump kits I sell.

Nurse Julie:
The oil pump shim is 14.80mm OD and 11.10 mm ID. Thickness 1 mm.

Deano400:
The washer (shim) is 14.95mm OD, 11.30mm ID and 0.98mm thick. I'm thinking it is the oil pump shim, the measurements are pretty close to your replacement Julie. Also I'm sure the last thing that was in the bath was the oil pump parts.

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