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I am not sure to post here or in Engine Tech

03 600rr - around 2700 miles and has been a track bike for most of those miles. I bought it as a track bike without an oil pressure gauge switch thingy, so I decided to put one on after a year of riding like this. Turns out, I think I know why it was missing... the low oil light turns on when the engine gets to operating temps and bike is idling. Blipping the throttle makes it go away. I decided to toss an oil pressure gauge on it. 6k rpm ~80psi, idle 10-15psi. The service manual doesn't go into idle pressure, so I don't really have a guide to start figuring this out. Only thing I can think of is that the o-ring for the pickup might be bad and leaking out pressure and that it is only affecting pressure at lower rpm. Or could the oil pressure relief valve be open and bleeding out all the pressure? I guess, either way, I have to drop the pan to find out.
 

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If the red light on your CBR 600 or CBR 1000 is on, don’t freak out. A lot of the time it could be a minor issue that’s easy and free to fix. The red light means that your motorcycle’s oil pressure is low. This can result from a number of things including a faulty sensor.

The first thing to check when your oil light is on is your battery cables. Often times the simplest things are the problem. Something as simple as a loose connection can cause your light to go on. If this happens, you might notice the bike lose power and bogging down as the red light comes on. It might either regain power or require you to shut the engine off and restart it.

Another obvious problem is a faulty sensor. It seems electronics are more trouble than they are worth sometimes. Every once in a while the sensor will go bad and throw the oil light on because of it.

An often overlooked issue is your cap being loose. If your cap isn’t on tight, the engine will lose pressure causing the light to pop on. Make sure both your cap and drain plug are tightened. If your motorcycle is leaking oil, it might be your drain plug not being screwed in all the way.

Too much or too little oil can also cause pressure issues. While it’s obvious that not enough oil can cause engine harm, it’s a less obvious fact that too much can also cause harm. If you overfilled your motorcycle passed the top notch on the viewing window, it can cause too much pressure to build. This will damage seals and other parts of the engine and could also cause the light to come on. Too little will also cause the red light to come on, however, you should never let it get that low.

If all else fails, you should take your bike to the Honda dealer. The oil light is not a suggestion, it’s a warning. Failure to take note of it may result in expensive engine repairs.
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If the red light on your CBR 600 or CBR 1000 is on, don’t freak out. A lot of the time it could be a minor issue that’s easy and free to fix. The red light means that your motorcycle’s oil pressure is low. This can result from a number of things including a faulty sensor.

The first thing to check when your oil light is on is your battery cables. Often times the simplest things are the problem. Something as simple as a loose connection can cause your light to go on. If this happens, you might notice the bike lose power and bogging down as the red light comes on. It might either regain power or require you to shut the engine off and restart it.

The oil pressure lamp is lit when there is a path to ground provided by the pressure switch. Loose battery cables would disrupt power to the whole bike, and wouldn't cause a ground to suddenly become available at the pressure switch. The led may dim if voltage goes low, but chances are your bike would stop running before that happened due to the EFI relay dropping.

Another obvious problem is a faulty sensor. It seems electronics are more trouble than they are worth sometimes. Every once in a while the sensor will go bad and throw the oil light on because of it.

An often overlooked issue is your cap being loose. If your cap isn’t on tight, the engine will lose pressure causing the light to pop on. Make sure both your cap and drain plug are tightened. If your motorcycle is leaking oil, it might be your drain plug not being screwed in all the way.

A loose cap will not cause a change in pressure. The crank case is vented into the air box, adding a vent in parallel makes no difference. The oil pressure switch is on the discharge side of the oil pump, the crank case is on the suction side, so this is not a potential cause in any way.

Too much or too little oil can also cause pressure issues. While it’s obvious that not enough oil can cause engine harm, it’s a less obvious fact that too much can also cause harm. If you overfilled your motorcycle passed the top notch on the viewing window, it can cause too much pressure to build. This will damage seals and other parts of the engine and could also cause the light to come on. Too little will also cause the red light to come on, however, you should never let it get that low.

Too much oil does not raise oil pressure. Again because the excess of oil is on the suction side of the pump, not the discharge. The level in the oil pan does not change the discharge rate of the pump because the pump is fixed displacement.

If anything overfilling can reduce oil pressure by introducing oil in the pan to the crank shaft. The spinning crank can whip air into the oil, making it compressible and reducing output pressure from the pump.


If all else fails, you should take your bike to the Honda dealer. The oil light is not a suggestion, it’s a warning. Failure to take note of it may result in expensive engine repairs.
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Whoa whoa whoa.... This is a really strange post.

I've added some comments within the quoted section as a lot of this is misleading.
 

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if it were me i'd pull the oil pressure switch and clean it out, make sure there's nothing affecting is ability to sense pressure. while you're in there check the quality of all the electrical connections.


if that doesn't rectify the issue, i'd consider trying a known good pressure switch (honda part # 35500-MJ4-024). it's about 25 bucks.

if that doesn't work, drop the oil pan and make sure the pickup screen is clean, and that there's nothing choking off the pump, pull the pump itself and inspect. given that your bike has so few miles for the age, it's possible it sat for a very long time and wasn't properly primed when restarted, this can cause damage to the pump itself.

a new pump is only 95 bucks (honda part # 15100-MEE-000), so while you're in there you may as well replace it anyway and put the whole thing to bed.
 
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