850 Cylinder wear

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several years ago pat mooney was playing around with oil ring tension in the manx he was racing and found anything less than 5 pounds turned it in to an oil burner enjoy your free beer :D

comnoz said:
[video]https://www.youtube.com/watch?v=Dz-8fSHiyZA[/video]
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Danno said:
comnoz said:
Danno said:
Modelo Dark it is.
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Cool, I would prefer delivery at a future motorcycle event when you can sit down and have one with me. Jim
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Happy to make that program. I retire at the end of this year and will have much more free time (and less money! haha) to do what I want.

Will you be at Barber Vintage Days this fall? I have a room and some pit passes if you're interested.
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I plan on it. I should be somewhere in the pits between CNW's exhibit and NYC Norton's shelter. Jim
 
I'll find you. I'll be in the E-bike pits in the old age and treachery section.
 
Good beer, cheers
 

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Rohan said:
Something not yet covered here is whether this is on BOTH cylinders, or just one cylinder ??
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Both cylinders,
please stop I cant take no more :!:
 
comnoz said:
splatt said:
comnoz said:
[
The wear pattern on MS850's cylinder walls are from the fact that the expander puts pressure on the backside of the rail slightly unevenly.
The initial wear is at the points where the pressure from the expander is the greatest.
. Jim
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If you look closely at the picture Jim you can see the compression rings have scuffed the bores in the same place as the white discolouration, indicating, to me anyway, that the cylinder walls are creating the high spots
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If the compression rings were "scuffing" also then why does the "scuffing" stop at the point of the upper travel of the oil ring instead of going all the way to the top of ring travel?
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It doesn't , the rings have scuffed right the way to the top in the same place as the heavy discolouration , its only the white marking that stops at the oil ring
 
splatt said:
It doesn't , the rings have scuffed right the way to the top in the same place as the heavy discolouration , its only the white marking that stops at the oil ring
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I do see scratches that go to the top of the ring travel, but I do not see scratches that are unusual when breaking in a Norton. Jim
 
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