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Will this oil pressure gauge work? 06 Jul 2015 10:53 #679666

  • cjaldous
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I'm trying to measure my KZ650s oil pressure. The oil light comes on after about 30-40 mins of riding when I'm idling.
I want to measure the pressure before replacing anything.

I haven't found mention of the thread sizes for either the main oil passage plug or the oil sender switch.

Will this work? I believe it comes with 1/8 and 1/4" NPT fittings.
shop.advanceautoparts.com/p/bosch-gauges...m=oil+pressure+gauge
1977 KZ650B

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Will this oil pressure gauge work? 06 Jul 2015 12:48 #679682

  • SWest
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It should work. How do you plan on mounting it? Do you have a test port above the ignition cover?
Steve

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Will this oil pressure gauge work? 06 Jul 2015 13:52 #679699

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I was just told that the sender threads are 1/8" BSPT and that a 1/8" NPT will probably barely fit, but I shouldn't wrench down too hard. I don't know if I have a test port, I'll check. I probably won't have room where the sender is anyway.

I don't plan on permanently mounting it. Probably strapping it somewhere with wire or some other kludgy method just so I can go for a test ride and monitor oil pressure.

I'll go ahead and get the gauge and to see what I'm dealing with.
1977 KZ650B

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Will this oil pressure gauge work? 06 Jul 2015 15:19 #679714

  • kaw-a-holic
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This is the test port Steve is referring to.

Jon
1977 KZ1000a1
Mesa, AZ
Phoenix Fighter Project
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Will this oil pressure gauge work? 06 Jul 2015 15:37 #679716

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were did u get that set up for the test port i just got a gpz 1100 and i want a oil gauge on it and is it the same on the kz 750

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Will this oil pressure gauge work? 06 Jul 2015 15:41 #679717

  • pete greek1
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Oil pressure is between 3-10 lbs on our bikes, ...I don't think you could get an, or any reading on that oil pressure gauge, ...look at the one kaw-a- holic is displaying, ...that's the kind you need
Pete
1980 LTD 1000..,1976 LTD 900, have the 1000&900 now. the rest are previous= 1978 KZ 650 B.., 1980 Yamaha XT 500..,1978 Yamaha DT 400.., 1977 Yamaha yz 80..,Honda trail ct 70.., Honda QA 50...5-1/2 hp brigs & straton CAT chopper mini bike...3-1/2 hp mini bike (WHEN GAS WAS ABOUT 45 CENTS A GALLON)!!!!

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Will this oil pressure gauge work? 06 Jul 2015 15:48 #679720

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kaw-a-holic wrote: This is the test port Steve is referring to.


You could order one like ours on eBay. Higher pressure though. I have two. One down there and on on my dash. The lower one works all the time the other one doesn't. Too low pressure on the big Z's.
Jon, that gasket is ON there. No sealant?
Steve

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Will this oil pressure gauge work? 06 Jul 2015 17:17 #679738

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swest wrote:

kaw-a-holic wrote: This is the test port Steve is referring to.


You could order one like ours on eBay. Higher pressure though. I have two. One down there and on on my dash. The lower one works all the time the other one doesn't. Too low pressure on the big Z's.
Jon, that gasket is ON there. No sealant?
Steve


As for the oil pressure gauge, look for one that is for motorcycles. You don't need anything that reads over 15 PSI.

Steve- yes the gasket is on there. I like to use copper coat on both sides of the gasket. Is it not needed?
Jon
1977 KZ1000a1
Mesa, AZ
Phoenix Fighter Project

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Will this oil pressure gauge work? 06 Jul 2015 17:37 #679750

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The smaller bikes have higher pressure. Ours won't work for him. They have plane bearing lower ends.
I don't use sealant normally. If in doubt I will.
Steve

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Will this oil pressure gauge work? 06 Jul 2015 17:46 #679758

  • missionkz
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Amazing how the internet, forums, searching and computers work if you just look....
kzrider.com/forum/2-engine/191024-kz650-oil-pressure
Bruce
1977 KZ1000A1
2016 Triumph T120 Bonneville
Far North East Metro Denver Colorado

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Will this oil pressure gauge work? 06 Jul 2015 18:02 #679765

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I reworked my oil pump. Instead of 3-10 PSI I have around 20 when cold. As much as 30 at Rev. It goes down as it heats up. Multi grade oil. I blew two Doremi gauges. I returned one and kept the other for the sexy plumbing fixture. This is a cheap Sportster gauge. 60 PSI. It works fine but the Bezel is plastic and is discoloring in the sun. I plan to repaint the case and get a better one soon.
Steve



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Will this oil pressure gauge work? 06 Jul 2015 18:33 #679779

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missionkz wrote: Amazing how the internet, forums, searching and computers work if you just look....
kzrider.com/forum/2-engine/191024-kz650-oil-pressure


Holy cow! Sorry for the mis information.
Jon
1977 KZ1000a1
Mesa, AZ
Phoenix Fighter Project

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