Oil pressure switch

[hampshirehog]

I've been working on a GS1100EX (US import) today and the oil light wasn't coming on with the engine switched off. With the wire earthed it was fine, so I pulled the switch out and cleaned the brass plate off and cleaned the contact point in the engine. While the switch was out I compared it with a spare I have (from a GSX1100efe) and they are both under spring tension apart from the last 4 or 5 millimetres of extension. I popped the original back in and it works. Started the engine it went out and came on again with the engine off.

Question(s): anyone got a new one to compare with - should they both be under spring tension for the whole movement or can somebody, with any GS engine with that design switch and with no carbs fitted, measure the depth to the engine contact ring from the top of the switch thread?

[Agemax]

just popped the switch out of my GS1000 and there is spring pressure all the way to fully extended. from the top face of the switch housing to the contact ring is 25mm. HTH

[hampshirehog]

Thanks Age -looks like I've got a couple of worn out ones.

[hampshirehog]

Here's the new one. A couple of mm longer extended under spring tension compared to the 30-year-old one.

[Agemax]

the old one looks kind of "wonky" at the top of the threads, or is that just the angle of the pic?

[hampshirehog]

The threads are fine though the top of the hex has perished a bit with sunstroke. I reckon she was a hot and dusty state bike originally as although she's free of wire worm all the rubber bits have started to perish (with that hint of vinegar smell) and there was a small desert in the clocks. Lovely that all the nuts and bolts undo easily though.

[Nessism]

Never seen a black plunger before. Guess it's one of those supercession things...

Part# 37820-45061
supersedes: 37820-45050, 37820-45060