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Piston Ring Service Life
- daveo
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04 Jun 2024 10:33 #900220
by daveo
1982 KZ1100-A2
Piston Ring Service Life was created by daveo
What is the average (miles-travelled) service life for a set of new rings when properly installed in a Kawasaki 1000-1100 J-motor?
1982 KZ1100-A2
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- Wookie58
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04 Jun 2024 10:47 #900221
by Wookie58
Replied by Wookie58 on topic Piston Ring Service Life
I guess it's like the old "how long is a piece of string" question. It's infinitely variable based on oil quality, the ways it's ridden, quality of air filter and how regularly it's changed, environment it's operated in etc etc etc
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- daveo
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04 Jun 2024 11:25 #900224
by daveo
1982 KZ1100-A2
Replied by daveo on topic Piston Ring Service Life
My MTC G1135 Pistons and rings have traveled 25k miles.
The engine currently consumes 1qt. per 350 miles on average.
I use Rotella T4 15w40 exclusively, and change oil/filter every 3k miles.
I typically run the engine 5-7k rpms, and frequently tap the red zone when upshifting.
Cylinder compression is 160 psi x 4. The piston crowns and spark plugs are dry.
Considering the miles and compression, might a cylinder hone and/or new oil rings help reduce the oil consumption?
The engine currently consumes 1qt. per 350 miles on average.
I use Rotella T4 15w40 exclusively, and change oil/filter every 3k miles.
I typically run the engine 5-7k rpms, and frequently tap the red zone when upshifting.
Cylinder compression is 160 psi x 4. The piston crowns and spark plugs are dry.
Considering the miles and compression, might a cylinder hone and/or new oil rings help reduce the oil consumption?
1982 KZ1100-A2
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- Wookie58
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04 Jun 2024 11:42 #900225
by Wookie58
Replied by Wookie58 on topic Piston Ring Service Life
Only my opinion but that does seem a little excessive (I will leave the guys who rack up miles on these bikes to share their consumption rates) compression looks goodMy MTC G1135 Pistons and rings have traveled 25k miles.
The engine currently consumes 1qt. per 350 miles on average.
I use Rotella T4 15w40 exclusively, and change oil/filter every 3k miles.
I typically run the engine 5-7k rpms, and frequently tap the red zone when upshifting.
Cylinder compression is 160 psi x 4. The piston crowns and spark plugs are dry.
Considering the miles and compression, might a cylinder hone and/or new oil rings help reduce the oil consumption?
- How much oil did it use when it had done 5000mls
- Is there adequate crankcase ventilation?
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- Nessism
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04 Jun 2024 12:10 #900227
by Nessism
Replied by Nessism on topic Piston Ring Service Life
Excess consumption. 20W-50 may slow consumption, but I doubt it will solve the problem.
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- hardrockminer
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04 Jun 2024 12:19 #900230
by hardrockminer
I have several restored bikes along with a 2006 Goldwing with a sidecar. My wife has a 2019 Suzuki DR 650 for on and off road.
Replied by hardrockminer on topic Piston Ring Service Life
I would expect the cylinders to be fine at 25k miles, and your compression seems to back that up. The oil ring is the lowest one of the three, while the upper ones are for compression, so you may still have a problem. It might be plugged drain holes in the piston groove for the oil rings. Or it might be valve seals allowing oil into the cylinders when you are parked. You didn't mention if you have a smoker. How is the exhaust?
I have several restored bikes along with a 2006 Goldwing with a sidecar. My wife has a 2019 Suzuki DR 650 for on and off road.
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- F64
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- 81-KZ440D2
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04 Jun 2024 16:13 - 04 Jun 2024 17:07 #900247
by F64
81-KZ440-D2.
Louis Dudzik's GM HEI ignitor conversion installed 2015 s3.amazonaws.com/gpzweb/Ignition/GPZgmHEImod.html
Motogadget m-unit blue installed 2017.
LIC, NY
Replied by F64 on topic Piston Ring Service Life
Did you use the Rotella T4 to break in the rings to the cylinder?
Did you hone the cylinders when you installed the new rings?
You could also send your oil in for analysis and look at the oxidation value.
Did you hone the cylinders when you installed the new rings?
You could also send your oil in for analysis and look at the oxidation value.
81-KZ440-D2.
Louis Dudzik's GM HEI ignitor conversion installed 2015 s3.amazonaws.com/gpzweb/Ignition/GPZgmHEImod.html
Motogadget m-unit blue installed 2017.
LIC, NY
Last edit: 04 Jun 2024 17:07 by F64.
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- daveo
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04 Jun 2024 16:48 - 04 Jun 2024 17:03 #900250
by daveo
1982 KZ1100-A2
Replied by daveo on topic Piston Ring Service Life
Rotella T4 since initial fire-up in 2019 when the MTC kit and cylinders were professionally prepped by Pit Stop Performance.
The cylinder head got a valve job and mild porting in 2021, and new Viton seals, just under 14k. miles ago...still beauteous.
Oil consumption has been a noticeable steady progression, same for the previous top end done in 2015.
Always wound up and rode like she was stolen...
...til yesterday.
The cylinder head got a valve job and mild porting in 2021, and new Viton seals, just under 14k. miles ago...still beauteous.
Oil consumption has been a noticeable steady progression, same for the previous top end done in 2015.
Always wound up and rode like she was stolen...
...til yesterday.
1982 KZ1100-A2
Last edit: 04 Jun 2024 17:03 by daveo.
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- SWest
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04 Jun 2024 21:09 #900261
by SWest
Replied by SWest on topic Piston Ring Service Life
The pistons are considered racing pistons. With that I would expect it to use oil. RIDING THE PISS OUT OF IT
would make it use more. If it were stock with 8-9/1it would be easier on oil and not run so hot. Are there service bulletins on this issue? Back in the day the 1000's were burning a lot of oil new and KHI said it was normal until they were made to fix it. Turns out it was steel valve guides so they went back to the bronze ones and they went back to normal. That was in stock form. I would like to know what the average would be on the higher compression builds. As it is my 1075 uses very little oil though I can see traces of it on the plugs.
Steve
Steve
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