650 Oil Pressure Specification - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 26 Old 08-22-2014, 03:28 PM Thread Starter
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650 Oil Pressure Specification

This is directed specifically for 2012+, but it probably covers previous models as well.

My new 2012 flickers the low oil pressure light at idle. The switch itself is opening and closing and doesn't appear to be a wiring issue. The manual states that the oil pressure specification is 28-85psi at 3,000rpm warm. Does anyone have a spec for idle pressure, or know the pressure that triggers the triggers the switch? I could not find either of those in the manual.

I am rigging up a mechanical gauge to check pressure out of the test port, and I was hoping someone would have a spec for idle pressure and switch trigger pressure. Once I get this tested, I am sure I will have more questions.

Thanks!
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post #2 of 26 Old 08-22-2014, 05:00 PM
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Don't know specifically, but somewhere between 2 and 6 psi-- probably closer to 2; not much pressure or flow is required at idle.

I would suspect:

Bad switch
Water in the sensor boot causing a partial ground

I had a non-DL bikes oil filter clog up and it did the same thing (stator rubbed the magnets).

Last edited by Kelly2012; 08-22-2014 at 05:06 PM.
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post #3 of 26 Old 08-22-2014, 08:47 PM
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Don't flog me for this but do you have the right amount of oil in it?
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post #4 of 26 Old 08-22-2014, 10:11 PM Thread Starter
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I am suspecting bad sensor. If I had the idle pressure spec or switch open spec, it would easily confirm one way or another. Don't want to throw parts at it.

2psi? Wow, I would have never guessed that.
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post #5 of 26 Old 08-22-2014, 11:03 PM
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Quote:
Originally Posted by Brad4321 View Post
I am suspecting bad sensor. If I had the idle pressure spec or switch open spec, it would easily confirm one way or another. Don't want to throw parts at it.

2psi? Wow, I would have never guessed that.
Most people freak out over low idle pressures which are generally pretty typical. I'd be more worried about seeing 85psi @ 3k as stated in the manual

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post #6 of 26 Old 08-23-2014, 08:26 AM Thread Starter
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If the pressure is low enough to set the light, that indicates a problem. Whether that is a problem in the oiling system or just a bad sensor is yet to be determined.
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post #7 of 26 Old 08-23-2014, 01:35 PM
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Quote:
Originally Posted by Brad4321 View Post
If the pressure is low enough to set the light, that indicates a problem. Whether that is a problem in the oiling system or just a bad sensor is yet to be determined.
True, and hopefully yours will be the latter. My statement was in regards to most who install an oil pressure gauge and see just how low the idle pressure is for the first time. Also, too high a pressure can be indicative of an obstruction downstream of the sensor which is often catastrophic due to low flow or misting

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post #8 of 26 Old 08-23-2014, 05:04 PM
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I installed an oil pressure gauge on my '67 Triumph Bonneville and almost had a stroke Oil pressure? What oil pressure?!
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post #9 of 26 Old 08-23-2014, 05:20 PM
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With no issues like knocking noises or oil light on above idle there is almost no chance this is a low oil pressure problem. Almost certainly it will be a sensor. Quite common in fact. Many of these sensors are set to 5-10 psi and as long as that is met at low rpm then it will be fine at higher rpms. Thus the 28-85 psi in the manual. That's a pretty wide spread to cover their ass with. With the much better engine machining now loss of oil pressure through poor bearing fit is almost impossible. One of the good things of new technology!

If Suzuki installed an analog direct read oil pressure gauge on the V Stroms greywolf would have to make an "oil pressure" sticky! It would scare many owners how it would fluctuate!

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post #10 of 26 Old 08-23-2014, 06:15 PM
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There is a big difference between engines with plain crankshaft and camshaft bearings and those with roller or ball bearings. The former need high pressure and the latter need low pressure.

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