Gen 4: 2011-2015 Brass in oil - Kawasaki
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post #1 of 14 Old 11-19-2017, 05:23 PM Thread Starter
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Brass in oil

This is a track bike, the engine is standard. Only kit ecu and exhaust.
I have a lot of metal fragments in my oil, looks like "gold". The fragments are found when I drain the oil. We also found som fragments in the oilpump, but not in the oil filter. We have already split the engine and all bearings are fine.
My only idea is that it could come from the friction plates in the clutch.
Does anyone have other ideas? I am a bit worried about this, but I have every opportunities to fix, the engine is already in atoms.
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post #2 of 14 Old 11-19-2017, 09:32 PM
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what year
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post #3 of 14 Old 11-20-2017, 03:34 AM Thread Starter
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The bike is 2011.
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post #4 of 14 Old 11-20-2017, 12:09 PM
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Most likely one conrod bearing is toasted. Lucky if journal is still round, if not then look for new crankshaft.

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post #5 of 14 Old 11-20-2017, 03:12 PM Thread Starter
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The bearings are checked and ok. So I have too look elsewhere. The only tip I have gotten is the clutch friction plates or the oil cooler. The engine is i pieces now and I have not been able to find the reason.
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post #6 of 14 Old 11-20-2017, 03:13 PM
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Looks like metal shavings which is not a clutch problem thats internal.

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post #7 of 14 Old 11-20-2017, 04:37 PM
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well, if all the bearings check out, and all the transmission parts are good, it's probably clutch material. I usually see similar particulate in my oil changes, and I have yet to toss a bearing. :)

If you want something better than a guess, though, send a sample off to be analyzed. :)

Attack life... it's going to kill you anyway.
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post #8 of 14 Old 11-20-2017, 08:09 PM
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post #9 of 14 Old 11-20-2017, 09:24 PM
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agree with spaz. only two sources of gold colored material in ur engine, rod/main bearing inner copper layer, and sintered brass impreginated in clutch friction plates. bearings good, fibers are only other source. i see that a lot also.
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post #10 of 14 Old 11-21-2017, 01:51 PM
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Me 2 and the bike is going strong...
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