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Teds new project a CB500 K1 mostly version 0.5 circa 1972.
McCabe-Thiele (Ted):
Removed the sump this morning - the pick up mesh was covered in a black slime that as I started to pull at it revealed what looks like fine mesh fibre - maybe something out of an oil filter 500 mesh filter by Macabe Thiele, on Flickr?
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Oddjob:
Looks like the oil filter has collapsed, had the same thing happen to me although mine almost covered the mesh. Check the filter and see if it has deformed, mine spiraled like someone had wrung it out. That's what you get for using non Honda filters.
When removing the filter Ted, don't forget that the spring has a large washer on top of it that gets stuck to the rubber of the filter and if you're not careful, thrown away with it.
K2-K6:
Certainly not supposed to be there Ted, and looks similar to some filter material.
However, the oil filter is only in line supply from oil pump and out through the pressured points at crankshaft etc. Makes me wonder if that's possible to pass so much material (is it more or less one piece) through an entire system without blocking it. Perhaps I've missed something along the way.
As Ken says, inspection of the filter may give a clue, but I can't immediately see it all going through that system to arrive at the sump in first place.
McCabe-Thiele (Ted):
The material completely covered the gauze - as the black sludge fell off it clumped into the bunch in the photo.
I'm going to investigate the filter but of course it could have come from a previous one.
Update: The filter I just removed looked fine - looks like a build up from previous filter(s).
Oddjob:
Mine went completely through the system as it ended up exactly like Teds, it may be fibres pass through and then mat onto the mesh. I do know it resulted in oil pressure light flickering on/off and scoring of the oil pump rotor tips, luckily I spotted it as I had an oil pressure gauge fitted at the time so I was able to slow down to avoid a seizure.
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