Oil pressure switch

randomwalk101 · February 22nd, 2011, 05:26 AM

Anyone know what's the Oil pressure switch does? It's located on left hand side right behind the header. I thought it was oil temp sensor but I looked up in the service manual and they call it Oil pressure switch instead. Does it switch on/off something?

dubojr1 · February 22nd, 2011, 05:29 AM

I believe that is what set's off the "low oil" dummy light.

stealth250 · February 22nd, 2011, 09:52 AM

Yes, it makes the oil light come on if the oil pressure goes below a certain amount. Ususally 2-3 psi. but I'm not exactly sure how low for the Kawi.

DaBlue1 · February 22nd, 2011, 10:07 AM

The oil pressure switch monitors the engine oil pressure. The engine oil pressure ranges from 14-25 psi max. Pressures below the min psi will initiate the warning light. If you ever happen to take the oil hose off you will notice how tiny the banjo holes are and how thin the hose is. I think the upper cylinder could benefit from better oil flow at higher rpms. That was one of my reasons for getting an oil cooler.

randomwalk101 · February 22nd, 2011, 12:56 PM

I replace that switch with an oil temp sensor (Koso)...not sure if that would do any damage...

FrugalNinja250 · February 22nd, 2011, 01:02 PM

Does the Koso gauge have a low pressure warning light? A switch simply completes the circuit through a light bulb when pressure goes lower than a preset amount. If the Koso doesn't have a low pressure warning light then you'll have to pay attention to the gauge to make sure you don't miss a low-pressure event.

dubojr1 · February 22nd, 2011, 01:06 PM

Quote:

Originally Posted by FrugalNinja250

Does the Koso gauge have a low pressure warning light? A switch simply completes the circuit through a light bulb when pressure goes lower than a preset amount. If the Koso doesn't have a low pressure warning light then you'll have to pay attention to the gauge to make sure you don't miss a low-pressure event.

Does the KOSO not have a low pressure warning hook-up?

dubojr1 · February 22nd, 2011, 01:12 PM

I just confirmed. The KOSO does have a low oil warning trigger. Should be a wire in the KOSO harness to hook to the stock oil pressure sensor or at least tap into somewhere.

Double check your wiring!!!

DaBlue1 · February 22nd, 2011, 01:19 PM

Quote:

Originally Posted by randomwalk101

I replace that switch with an oil temp sensor (Koso)...not sure if that would do any damage...

Do not replace the switch with the hose on it. Put the Koso oil temp sensor on the old oil drain plug on the bottom of the engine. The old drain plug location is next to the oil filter cover.

randomwalk101 · February 22nd, 2011, 01:40 PM

Whoops..It looks like I'll be changing my oil tonight

HKr1 · February 22nd, 2011, 02:39 PM

Quote:

Originally Posted by randomwalk101

I replace that switch with an oil temp sensor (Koso)...not sure if that would do any damage...

Dont see any problem with that.

That stock switch was only good for oil light and the temp light check. New gauge has no use for it.

Unless that koso is different from the instructions I looked at, they didnt even deal with oil pressure???

randomwalk101 · February 22nd, 2011, 07:33 PM

Not sure. Koso does have an oil light. I moved the oil temp sensor down to the old oil drain as recommended a d put back stock oil pressure sensor.
I ha e a plug and play wire set so no splicing. Just plug it in and go.

dubojr1 · February 23rd, 2011, 07:41 AM

Well I would think the KOSO oil light would be on when the key is turned on and it should go off shortly after the bike starts... just like stock.

randomwalk101 · February 23rd, 2011, 06:58 PM

Yes. That is correct

February 22nd, 2011, 05:26 AM	#1
randomwalk101 self wrencher Name: john Location: houston Join Date: Dec 2008 Motorcycle(s): 08 250r and 07 600r Posts: A lot.	Oil pressure switch Anyone know what's the Oil pressure switch does? It's located on left hand side right behind the header. I thought it was oil temp sensor but I looked up in the service manual and they call it Oil pressure switch instead. Does it switch on/off something?

February 22nd, 2011, 05:29 AM	#2
dubojr1 ninjette.org certified postwhore Name: Jason Location: Jacksonville, Florida Join Date: May 2010 Motorcycle(s): 09 Ninja 250R SE, 07 Honda CRF230F, 06 Honda CRF150F Posts: A lot.	I believe that is what set's off the "low oil" dummy light. __________________________________________________ 09 250R SE: Paying it forward one post at a time! Don't forget to add yourself to our Member Map

February 22nd, 2011, 09:52 AM	#3
stealth250 Gearhead Name: Mike Location: IND Join Date: Jun 2009 Motorcycle(s): 2008 Kawasaki Ninja 250R Posts: 242	Yes, it makes the oil light come on if the oil pressure goes below a certain amount. Ususally 2-3 psi. but I'm not exactly sure how low for the Kawi. __________________________________________________

February 22nd, 2011, 01:12 PM	#8
dubojr1 ninjette.org certified postwhore Name: Jason Location: Jacksonville, Florida Join Date: May 2010 Motorcycle(s): 09 Ninja 250R SE, 07 Honda CRF230F, 06 Honda CRF150F Posts: A lot.	I just confirmed. The KOSO does have a low oil warning trigger. Should be a wire in the KOSO harness to hook to the stock oil pressure sensor or at least tap into somewhere. Double check your wiring!!! __________________________________________________ 09 250R SE: Paying it forward one post at a time! Don't forget to add yourself to our Member Map

February 23rd, 2011, 07:41 AM	#13
dubojr1 ninjette.org certified postwhore Name: Jason Location: Jacksonville, Florida Join Date: May 2010 Motorcycle(s): 09 Ninja 250R SE, 07 Honda CRF230F, 06 Honda CRF150F Posts: A lot.	Well I would think the KOSO oil light would be on when the key is turned on and it should go off shortly after the bike starts... just like stock. __________________________________________________ 09 250R SE: Paying it forward one post at a time! Don't forget to add yourself to our Member Map

February 22nd, 2011, 10:07 AM	#4
DaBlue1 Long Time Rider Name: Blue Location: Charlotte, NC Join Date: Sep 2010 Motorcycle(s): 2009 Kawasaki Ninja 250R Posts: A lot.	The oil pressure switch monitors the engine oil pressure. The engine oil pressure ranges from 14-25 psi max. Pressures below the min psi will initiate the warning light. If you ever happen to take the oil hose off you will notice how tiny the banjo holes are and how thin the hose is. I think the upper cylinder could benefit from better oil flow at higher rpms. That was one of my reasons for getting an oil cooler.

February 22nd, 2011, 12:56 PM	#5
randomwalk101 self wrencher Name: john Location: houston Join Date: Dec 2008 Motorcycle(s): 08 250r and 07 600r Posts: A lot.	I replace that switch with an oil temp sensor (Koso)...not sure if that would do any damage...

February 22nd, 2011, 01:02 PM	#6
FrugalNinja250 ninjette.org certified postwhore Name: Frugal Location: Dallas/Fort Worth (DFW) Join Date: Mar 2010 Motorcycle(s): Several Posts: A lot.	Does the Koso gauge have a low pressure warning light? A switch simply completes the circuit through a light bulb when pressure goes lower than a preset amount. If the Koso doesn't have a low pressure warning light then you'll have to pay attention to the gauge to make sure you don't miss a low-pressure event.

February 22nd, 2011, 01:40 PM	#10
randomwalk101 self wrencher Name: john Location: houston Join Date: Dec 2008 Motorcycle(s): 08 250r and 07 600r Posts: A lot.	Whoops..It looks like I'll be changing my oil tonight

February 22nd, 2011, 07:33 PM	#12
randomwalk101 self wrencher Name: john Location: houston Join Date: Dec 2008 Motorcycle(s): 08 250r and 07 600r Posts: A lot.	Not sure. Koso does have an oil light. I moved the oil temp sensor down to the old oil drain as recommended a d put back stock oil pressure sensor. I ha e a plug and play wire set so no splicing. Just plug it in and go.

February 23rd, 2011, 06:58 PM	#14
randomwalk101 self wrencher Name: john Location: houston Join Date: Dec 2008 Motorcycle(s): 08 250r and 07 600r Posts: A lot.	Yes. That is correct

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