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Cb750 Oil pressure very high

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jimv50:
It could be that the oil is being frothed up when the engine is running, possibly due to the breather not working correctly, can you check this is clear and working as it should be?
Relief valve could well be the culprit though.

jimv50:
Just had a quick look elsewhere online for similar problems, can you change the oil tank for another one and try it all again?
blocked return pipework was another possibility or another idea was an air oil separator not working as it should.
All a mystery to me all these things,

NigelWilmshurst:
Thanks all
I will swap the oil tank and check the lines etc, report back ASAP.

Trigger:
Are you sure that the oil is coming from the oil tank over flow and not the top end engine breather pipe ?

NigelWilmshurst:
Trig
Definitely the oil tank overflow,
I found on google somebody had the same problem, changed the oil tank and all ok!

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