SOHC.co.uk Forums > CB500/550

Oil pressure.

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Johnny4428:
Holy cow Trigger! Lot of pressure to do that. Thanks all for reply’s, the tick over speed is around 1100rpm.
I’m quite sure all is well as far as oil pump goes, but I’m having doubts now about aftermarket oil pressure switch. (too tight to by an OEM one at the time)😆 Don’t know how accurate the gauge is Julie. I will see if I can test against some other known pressures. That explains why the gauge went up to 60psi and didn’t go above although I only tested up to 2500rpm. More testing to come.

Trigger:
You can get a Honda genuine switch from Julie at about £25.
Maybe it is the aftermarket switch is at fault. Don't know if you read this, but i was getting different pressures with a aftermarket brake switch >>> https://www.sohc.co.uk/index.php/topic,29459.msg283073.html#msg283073

Johnny4428:
Yes, read that indeed Trigger, what a bummer. That would have pushed most folks patience getting to the bottom of that. Yes definately going to change out pressure switch. I’ll give Julie a message. Thanks.

Johnny4428:
Just to follow up a bit, I carried out an oil pressure test on the 750 with similar results to the 550 maybe a tad higher pressure at a similar idle speed. Have ordered another oil pressure switch from Nurse Julie just for peace of mind. I think it is safe to say that the oil pressure anxiety is easing.

Trigger:
I was testing some oil pumps today for a 550 and was getting 45PSI at the oil pressure switch port at 1200 RPM. Yours seems to be with in spec  ;) 

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