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#835013 12/31/20 5:26 pm
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Kevin E Offline OP
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Hi all.

I thought I’d put this in a new thread as my original thread on this subject turned into a mass argument on the thread form used for the pressure switch.

I have attached a photograph of the OPRV area on my engine and the question is; can I remove the slotted plug / bung and fit an oil pressure switch there?

Thank you all for your comments and advice on this forum. A happy new year and best wishes to you all.

Kev E

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I think you could. I think that plug is from where the factory drilled the oil way from the pump to the OPRV 'chamber'.
Of course, you would have to get the threads right! smile

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You could give it a go but I think you’ll find the frame rails foul that area.


Now let’s all have a beer beerchug

68’ A65 Lightning “clubman”
71’ A65 823 Thunderbolt (undergoing restoration)
67’ D10 sportsman (undergoing restoration)
68’ D14 trials (undergoing transformation)

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Frame is in the way but you can cut a hole in it. Thread inside is 1/4-26 but you can drill and tap it out to 1/8NPP. There is not enough wall thickness for the switch but you can weld on a bung.

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Instead of the switch, maybe there is enough room to run an adapter for an oil pressure gauge mounted on the handlebars or somewhere like that. You would also have an idea of if your OPRV was working!

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Or use an OPRV that has a port for an oil pressure gauge.
[Linked Image from live.staticflickr.com]

2 members like this: MarksterTT, Allan G
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Yeah, I like that where can i get it, should fit just fine

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Kevin E Offline OP
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Originally Posted by andyame1974
Yeah, I like that where can i get it, should fit just fine
Originally Posted by DMadigan
Or use an OPRV that has a port for an oil pressure gauge.
[Linked Image from live.staticflickr.com]

Ditto, where can we get one?

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Waiting on real life testing. At the moment I can only do a water test.


Moderated by  Allan G, Jon W. Whitley 

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