SOHC.co.uk Forums > CB500/550

Oil pressure switch

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Seamus:
Is the genuine Honda part any better than the after market version. Want to change mine as it sometimes flickers when hot.
Cheers

deltarider:
Definitely not. In my experience all OEM switches on CB350F and CB500/550 seem to give up sooner or later. Any switch that has the right thread (!), will do. And do not try to screw it in all the way!

Trigger:
Oil pressure switches or sensor are NOT all the same even with the same thread  :o

Oil pressure switches are rated in BAR max pressure. You can get a switch that has a value of as low as 0.25 bar to upwards to many, many bar. Put the wrong rated switch in and though the light may have gone out, your engine may not be getting the correct pressure  ;)

Flickering of a oil light can mean :
Incorrect oil.
The oil had started to break down.
Knickered oil pump.
Oil galley cracked or cut through by chain
and so on.   

Seamus:
Thanks for the replies. Will order an aftermarket one and see how it goes. Noticed a bit of flickering after a fastish run, when the motor was hot. Oil (Silkolene 10/40) and filter (genuine) have only done 300 miles.
Easiest option is to change the switch and see if that sorts it.

Trigger:

--- Quote from: Seamus on August 12, 2021, 08:05:45 AM ---Thanks for the replies. Will order an aftermarket one and see how it goes. Noticed a bit of flickering after a fastish run, when the motor was hot. Oil (Silkolene 10/40) and filter (genuine) have only done 300 miles.
Easiest option is to change the switch and see if that sorts it.

--- End quote ---


If the oil you are using is silkolene 10/40 synthetic then, you are using the incorrect oil and it would be better to change it to mineral oil  ;)

If after changing to the correct oil it still flickering , the oil pump is not delivering the correct pressure .

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