SOHC.co.uk Forums > CB350/400

Oil pump O rings

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Dave487:
I recently ordered the following from Mayday Seals after a bit of investigation from this forum and some guestimates

 7 mm x 1.5 mm O-Ring - Material : Nitrile 70 3 off
16 mm x 2.5 mm O-Ring - Material : Nitrile 70 2 off
27 mm x 2 mm O-Ring - Material : Nitrile 70 1 off
41 mm x 2 mm O-Ring - Material : Nitrile 70 1 off
63 mm x 2.5 mm O-Ring - Material : Nitrile 70 1 off

They all seem to fit ok when I re-assembled the pump but I haven't run the engine yet so not checked the pressure or for leaks.
 

Nurse Julie:
Agree with the 7mm x 1.5mm,  63mm x 2.5mm and 27mm x 2mm.........but I put different size O rings in to the others you mention. All viton. Mine is up and running, with good pressure and no leaks.

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