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Very low mile(2500) motorcycle with high oil consumption and high blow by in the airbox
Notice what the problem might be?
Notice what the problem might be?
Oil Consumption-This might be your problem too!
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BritTwit
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Nothing new.
My 2013 961 CR was delivered with the same problem.
Smoked like a house on fire until it warmed up, and used lots of oil.
Factory fixed it through my dealer in 2014.
www.accessnorton.com
My 2013 961 CR was delivered with the same problem.
Smoked like a house on fire until it warmed up, and used lots of oil.
Factory fixed it through my dealer in 2014.
“WHICH PARTS FROM OTHER BIKES FIT THE 961”
Well Access Norton has my attention atm along with all you all . As uncertainty exists at this stage I thought this thread may be of reference if we can’t get spares , we know brembo callipers go on brakes for other bikes but which ones , & I think the discs may be Yamaha ? , I know the red...
www.accessnorton.com
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Doesn't matter as the rings slowly rotate and why 2-stroke rings are pegged.
Rotation of piston rings
Piston rings lead a much more active life than might be thought. While we usually imagine that they only reciprocate in a motion defined by the piston, they also rotate during service. Such rotation has been the subject of many experiments and studies over the years, but this is not simply a...
www.highpowermedia.com
Method for Measurement of Piston Ring Rotation in an Operating Engine on JSTOR
A radiotracer technique has been developed to monitor the rotational movement of piston rings during engine operation. Each ring to be monitored is modified by ...
Everything You Wanted to Know about Piston Ring Grooves
Ring groove placement, size, and finish are paramount attributes to overall piston performance.
blog.wiseco.com
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Built many engines and never had rings rotate. They might shift slightly but never moved. Also the chances of all of them lining up is lottery winning.Doesn't matter as the rings slowly rotate and why 2-stroke rings are pegged.
Rotation of piston rings
Piston rings lead a much more active life than might be thought. While we usually imagine that they only reciprocate in a motion defined by the piston, they also rotate during service. Such rotation has been the subject of many experiments and studies over the years, but this is not simply a...www.highpowermedia.comMethod for Measurement of Piston Ring Rotation in an Operating Engine on JSTOR
A radiotracer technique has been developed to monitor the rotational movement of piston rings during engine operation. Each ring to be monitored is modified by ...www.jstor.org
"The main purpose for axial clearance is to allow the ring to spin. The cross-hatch in the cylinder walls induces rotation of the rings."Everything You Wanted to Know about Piston Ring Grooves
Ring groove placement, size, and finish are paramount attributes to overall piston performance.
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Nevertheless, rings are known to rotate.
Piston Ring Rotation - Engine & fuel engineering - Eng-Tips
Hi, Everyone knows rings rotate, does anyone know what forces cause this? It has been observed in Pyrex cylinders, so that rules out cross hatch as the reason.
Do Piston Rings Rotate?
I'm wondering if I can pull a piston out and inspect it and the cylinder and if all is well put in back in without doing any harm. Thanks.
www.hotrodders.com
Do piston rings rotate on the piston? - Club Cobra
Help, I'm trying to regain my equilibrium. I'm nearly 60 years old and I read a post on another forum where the writer asserted that piston rings
www.clubcobra.com
Do piston rings turn when the engine is running?
Do piston rings turn when the engine is running?
stunthanger.com
How do piston rings work? - Neeness
How do piston rings work? Piston rings seal the combustion chamber, conduct heat from the piston to the cylinder wall, and return oil to the crankcase.
neeness.com
PISTON RINGS - The Technical Forum Archive
PISTON RINGS - posted in The Technical Forum Archive: It would be interesting to compare notes on this subject . As a young development engineer working on the Napier Deltic engine, my boss asked me to look in to this and send him a report. After a lot of head scratching my conclusions were as...
so who as seen rings rotate after install?? - Honda-Tech - Honda Forum Discussion
Forced Induction - so who as seen rings rotate after install?? - after experiencing a fair bit of oil burning i took the engine apart today. keep in mind it had 384 miles on it. i found that all the piston rings had rotated around in the bore after being installed. i use the factory specs for...
honda-tech.com
Piston ring orientation?
I'm putting my 1977 KZ1000 engine back together this week. It has Wiseco pistons in it, The new rings came with little instructions that show how to position...
www.kzrider.com
PISTON RING ALIGNMENT? - Engine & fuel engineering - Eng-Tips
When inspecting engines returned for warranty complaints, we keep comming upon a large number (approx 5%-10%) of engines where the 1st.compression and 2nd. comp
Method for Measurement of Piston Ring Rotation in an Operating Engine on JSTOR
A radiotracer technique has been developed to monitor the rotational movement of piston rings during engine operation. Each ring to be monitored is modified by ...
Piston Ring Placement
Installing new rings on the 850 Norton. I've got a new set of AE Federal Mogul rings, with a 'one' piece cast iron oil control ring, rather than the...
www.advrider.com
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If the ring gaps stay lined up oil consumption and blow by will be higher.
Time Warp
.......back to the 70's.
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A Graham Bell suggested 0.7 rpm rotation (as a general rule probably not)
If that is a modern 'Norton engine and the compression and oil scrapers (three piece) were anywhere near lined up I would put my Lotto guess on a disgruntled assembler. (Or they had worked at the local chip shop before scoring a job at the factory as a technician)
Edit, I missed the 0.
If that is a modern 'Norton engine and the compression and oil scrapers (three piece) were anywhere near lined up I would put my Lotto guess on a disgruntled assembler. (Or they had worked at the local chip shop before scoring a job at the factory as a technician)
Edit, I missed the 0.
Last edited:
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yes 961. And they have 4 rings and we agree it was someone's bad day.
Time Warp
.......back to the 70's.
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Google suggests the cross hatch in the bore and cylinder pressure for one.
Somewhere else suggested that reduced once an engine is run in (cylinder wall finish and type perhaps)
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yes and no. The faster the speed the less chance of movement.
The point of the post was that the motorcycle has high consumption and when disassembled we found the rings lined up. That's not "rotation" that's crappy factory work as evidenced by the worn groove in the bore as well.
Be careful of the internet. Someone is going to quote the Journal of the Korean Nuclear Society where they did a test of a single cylinder hydrogen engine at fixed rpm and pressure.
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The top of the pistons are the giveaway. That build up for such low miles is a result of the rings.
marshg246
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I'm sure that rings rotate - don't have an opinion on how fast, why, or if it is all rings (there are lots of types). I was told during my first motorcycle engine rebuild in 1968 to put the top ring at 10, the middle at 2 and the oil at 6 (oil to the rear). I've done that on every engine since no matter how many cylinders. The few that I've taken apart that I built always had the rings different from my setup and surprisingly usually still spaced about 120 degrees apart.
You would think that logic would dictate that cross-hatching, if it caused them to move at all, would make them move back and forth.
IMHO and only guessing: lining up the ring gaps should not cause more oil-related carbon on top of the pistons. The oil-control rings should still do their job. If related to the rings, I would say, gaps wrong, ring(s) upside down, bad hone, wrong rings for the pistons (groove fit), etc. Other possible causes: if oil tank and breathes into air cleaner, too much oil entering carbs, too rich (not oil carbon, gas carbon), ale guides leaking oil, blocked crankcase breather, etc.
You would think that logic would dictate that cross-hatching, if it caused them to move at all, would make them move back and forth.
IMHO and only guessing: lining up the ring gaps should not cause more oil-related carbon on top of the pistons. The oil-control rings should still do their job. If related to the rings, I would say, gaps wrong, ring(s) upside down, bad hone, wrong rings for the pistons (groove fit), etc. Other possible causes: if oil tank and breathes into air cleaner, too much oil entering carbs, too rich (not oil carbon, gas carbon), ale guides leaking oil, blocked crankcase breather, etc.
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Greg, This is a 961 and not when the oil rings are facing the same way as we found. And this motorcycle had more than normal top end pressure as well from this issue.
Time Warp
.......back to the 70's.
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It depends on the hemisphere which way they rotate.
Perhaps back and forth on the Equator.
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Yes and the numbers are why we tore the engine down. Top end was fine but the cylinder not so much
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We use total seal on all of our commando builds and actually are thinking about using them here to see if we can clean up some of the oil issues
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