oops. I had a gallon jug of Rotella in the garage that had about a half quart in it. Used that to add oil to my crankcase. I saw through the filler hole a dark flake laying atop the clutch plates. Picked it up. Looks to be a chunk of dried leave. The sort of thing that might get blown into my oil drain pan after i let it sit a couple days after an oil change. Seems to me, this was a jug of DUMP oil I had forgotten to mark as such. accidentally poured about six ounces in the bike.

Not too big of a deal, I need to change the oil in the bike in 500 miles anyway so I will do it now rather than run the crap oil with worse crap oil I accidentally added to it.

If the crank Case oil flows through the filter first, the filter should pick up any other little chunkies that might have been deposited in the crank case. If so, I will give the bike a good hard run and stir up the oil good before the oil change.

Question is: Does the crankcase oil go through the oil filter before circulating in the engine? ...or is it the return trip that the oil goes through the filter?

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I'm going to say it does....there is a diagram of the oil flow...I haven't looked at it in a long time...Wouldn't be too okay to have the 'unfiltered' oil getting to the Top end and such BEFORE it passed the filter.I should just go look at the schematic....but I say NO...it filters first.(continuously I mean).

Adding oil with a 'leaf' in it at the crankcase fill hole...it would drop down to the pan,then be sucked up by the oil pump....I can't see any problem.Crunched up in the clutch pack...'maybe'...but still,not anything to worry about IMO.

* Last updated by: Grn14 on 7/19/2013 @ 2:31 PM *

Hey rook, I believe the oil pickup lines for the top end bypass the filter, its the return trip. So debris of any type could clog one of the pickup lines. The diagram to confirm this exists within the instructions for increasing oil flow in that old zx-11d I had. It had a problem with its pickup line causing starvation to #3 of course. And I am looking but I gave the diagram with all papers when sold.

* Last updated by: Cblast on 7/19/2013 @ 10:05 PM *

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Judging by this diagram, I would say you are fine. I would drain it though. There could be other contaminants suspended in the oil.

* Last updated by: fatsix on 7/20/2013 @ 6:15 AM *

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All pressure lubricated parts are fed filtered oil. The entire oil pump output is channeled through the filter before moving on to engine components.

The pickup tube has a screen in it as well.

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Yup! That vertical feed line between points 11 and 12! Feeds the filter first! I see that now!

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Drop the sump pan. You don't know what else flowed to the bottom. Besides, you can inspect for sediment from the clutch pack looking all a light gray powder that cakes at the bottom.

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Judging by this diagram, I would say you are fine. I would drain it though. There could be other contaminants suspended in the oil.

I stopped at the service counter at the dealer when I picked up my oil filter. The guy showed me the diagram Cblast posted in his response above. The oil does filter through the oil filter before leaving the pan so there should be no problem with running the motor for a fewminutes before I change oil. This may actually be oil from my last car oil change. I'm going to run it for a short trip. If I don't, there might be some other junk stuck to the clutch plates and it won't be removed. Running the engine is the best chance I have at getting all stuff that would float up in the oil pan to be trapped in the filter. If I don't get it all, there is always next oil change.

Drop the sump pan. You don't know what else flowed to the bottom. Besides, you can inspect for sediment from the clutch pack looking all a light gray powder that cakes at the bottom.

I know that would be best but I'm betting on this not being a big enough risk to go through all of that. I've made this same screw up before, using refuse oil, and never had oil starvation. Be interesting to see what might be in the bottom of the pan when I open up the crankcase some day. Not any time real soon though.

Thanks for responses all.

* Last updated by: Rook on 7/21/2013 @ 8:51 AM *

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I might be late, but as a paranoid person, I'd drain it, add some cheap oil, run it a short time, and change it for good. My problem would be the old oil's lubrication capabilities, even for a short run. Why risk it. Oil is cheap.

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Ya, it was just a few ounces I added so I doubt the lube quality could have been all that much worse than the 2000 mile, sat over winter storage oil that was in there. I drained it. Figured I might as well. NO reason to run th ejunk oil. If there is anything that is left in the pan to get trapped by the pickup screen, that will happen with fresh oil just the same as it would with the old oil.

Saw nothing unusual in the drain pan, I prolly found the one and only chunky that was poured in there.

Still have my metal shavings in the drain oil. That has been hapening ever since going to the quickshifter. Looks like bronzy colored flakes in the pan. So I have bearings wearing and something steel, prolly shift dogs.

wish I could find that thread.. About time I posted latest pics of the metal that comes out in my oil. Phuck if I have to worry about what I accidentally pour in....it's what comes out! Oh well. bike runs great. Hope I find out what the problem is before I need to replace the whole engine.

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Been thinkin about this rook, only time I ever felt a crank bearing go on a motorcycle was that old zx-11d. I felt an almost cavitation type hum from the motor. Stopped as soon as I could and decided to tear it down. It was totally shot and about to let the whole dang works go. I got lucky. I was in 5th flat out when I felt the cavitation start. If you aren't feeling any of that, it must be something with the shifter. Because it is YOUR bike too. Not like the valves have been neglected or anything or maintenance hasn't been done. Just my 2c. what I meant is, that zx11 that went on me was way abused before I got my hands on her. Your bike hasn't been abused or neglected to the point of bearing failure ya know what I mean?? :))

* Last updated by: Cblast on 7/27/2013 @ 7:16 AM *

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Thanks, C. heh- IDK?? I'm not going to worry about it. I'll just keep my eye on things like always.

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