Topic: 71 cb750 oil pump o rings?

[original]

does anyone know the size of the o ring on the pump cover( the one with the three screws), cant seem to find it anywhere, i had the cover off and the oring dosent seemed to be damaged but should i replace it anyway since i have it off? 

[Magpie]

If you're talking about the 3 o rings that go over the dowels that locate the pump body to the engine case they are 15 x 2.5 according to my parts book. If it's not damaged and feels soft it may be ok.
Cliff

[Bodi]

That's what Honda calls a "non-service" part, you can only buy (or could once) the entire pump assembly - #1 on the diagram. So the only source is aftermarket, either find the correct size or get the appropriate diameter cord and glue one up. If it's not damaged I would just put it back in. I don't think it seals any major leak source, only whatever oil leaks past the outer rotor should get to the seal.

[mcpuffett]

Hi you can buy these parts from david silvers here in the uk , i have just replaced the 3 seals and the 3 dowels  ,  mick.