Carbon on Pistons
#11
Absolutely not, carbon on the pistons causes hot spots which then causes preignition and in these Harley motors can easily be avoided when going to a nice breather system, I've seen a picture of a v-twin with 8k miles and the piston looked terrible then a picture with 27k miles and it was a world of difference pictures attached, the crap system is the main culprit of carbon build up
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Cosmic Razorback (06-10-2020)
#12
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Cosmic Razorback (06-10-2020)
#13
The following 3 users liked this post by KrustyKush:
#14
Okay guys thank you all very much for the posts and replies. Below are pictures of the pistons that just came out of my bike. It has 29k miles on it. A stock 2017 CVO 114. In October of last year, 8 months now we did add Reinhart DBX 45 slip ons. For what it is worth I did add the correct per the book oil quantity on the last change I did myself and have been getting oil out of the breather for the last 3 to 4 k miles.
I used to have a go fast boat with twin 540 BB’s with Whipple stage II superchargers putting out 900 HO each. I would pull the heads every year or two and never any carbon build up. Had a Jeep with a built 350 v8, zero issues and also a Jeep with the older 258 inline 6 that I had to pull the head to replace lifters and no carbon.
So when I saw these my first thought was what is going on and what am I doing wrong? I was home with these parts before I ever saw and inspected them so have not spoken to the dealer. They did not raise any concerns to me either about them.
Never any sumping, transfer, oil burning etc. The Cylinder walls and cam are beautiful. Just this stupid carbon.
The bike spends the majority of it’s time between 2500 to 3200 RPM.
I used to have a go fast boat with twin 540 BB’s with Whipple stage II superchargers putting out 900 HO each. I would pull the heads every year or two and never any carbon build up. Had a Jeep with a built 350 v8, zero issues and also a Jeep with the older 258 inline 6 that I had to pull the head to replace lifters and no carbon.
So when I saw these my first thought was what is going on and what am I doing wrong? I was home with these parts before I ever saw and inspected them so have not spoken to the dealer. They did not raise any concerns to me either about them.
Never any sumping, transfer, oil burning etc. The Cylinder walls and cam are beautiful. Just this stupid carbon.
The bike spends the majority of it’s time between 2500 to 3200 RPM.
Last edited by Cosmic Razorback; 06-10-2020 at 05:53 PM.
#15
The following 2 users liked this post by Iceman24:
Cosmic Razorback (06-10-2020),
wannavee (07-02-2022)
#16
Okay guys thank you all very much for the posts and replies. Below are pictures of the pistons that just came out of my bike. It has 29k miles on it. A stock 2017 CVO 114. In October of last year, 8 months now we did add Reinhart DBX 45 slip ons. For what it is worth I did add the correct per the book oil quantity on the last change I did myself and have been getting oil out of the breather for the last 3 to 4 k miles.
I used to have a go fast boat with twin 540 BB’s with Whipple stage II superchargers putting out 900 HO each. I would pull the heads every year or two and never any carbon build up. Had a Jeep with a built 350 v8, zero issues and also a Jeep with the older 258 inline 6 that I had to pull the head to replace lifters and no carbon.
So when I saw these my first thought was what is going on and what am I doing wrong? I was home with these parts before I ever saw and inspected them so have not spoken to the dealer. They did not raise any concerns to me either about them.
Never any sumping, transfer, oil burning etc. The Cylinder walls and can are beautiful. Just this stupid carbon.
The bike spends the majority of it’s time between 2500 to 3200 RPM.
I used to have a go fast boat with twin 540 BB’s with Whipple stage II superchargers putting out 900 HO each. I would pull the heads every year or two and never any carbon build up. Had a Jeep with a built 350 v8, zero issues and also a Jeep with the older 258 inline 6 that I had to pull the head to replace lifters and no carbon.
So when I saw these my first thought was what is going on and what am I doing wrong? I was home with these parts before I ever saw and inspected them so have not spoken to the dealer. They did not raise any concerns to me either about them.
Never any sumping, transfer, oil burning etc. The Cylinder walls and can are beautiful. Just this stupid carbon.
The bike spends the majority of it’s time between 2500 to 3200 RPM.
The following users liked this post:
Cosmic Razorback (06-10-2020)
#17
Okay guys thank you all very much for the posts and replies. Below are pictures of the pistons that just came out of my bike. It has 29k miles on it. A stock 2017 CVO 114. In October of last year, 8 months now we did add Reinhart DBX 45 slip ons. For what it is worth I did add the correct per the book oil quantity on the last change I did myself and have been getting oil out of the breather for the last 3 to 4 k miles.
I used to have a go fast boat with twin 540 BB’s with Whipple stage II superchargers putting out 900 HO each. I would pull the heads every year or two and never any carbon build up. Had a Jeep with a built 350 v8, zero issues and also a Jeep with the older 258 inline 6 that I had to pull the head to replace lifters and no carbon.
So when I saw these my first thought was what is going on and what am I doing wrong? I was home with these parts before I ever saw and inspected them so have not spoken to the dealer. They did not raise any concerns to me either about them.
Never any sumping, transfer, oil burning etc. The Cylinder walls and cam are beautiful. Just this stupid carbon.
The bike spends the majority of it’s time between 2500 to 3200 RPM.
I used to have a go fast boat with twin 540 BB’s with Whipple stage II superchargers putting out 900 HO each. I would pull the heads every year or two and never any carbon build up. Had a Jeep with a built 350 v8, zero issues and also a Jeep with the older 258 inline 6 that I had to pull the head to replace lifters and no carbon.
So when I saw these my first thought was what is going on and what am I doing wrong? I was home with these parts before I ever saw and inspected them so have not spoken to the dealer. They did not raise any concerns to me either about them.
Never any sumping, transfer, oil burning etc. The Cylinder walls and cam are beautiful. Just this stupid carbon.
The bike spends the majority of it’s time between 2500 to 3200 RPM.
I did a breather bypass with 6 miles on my bike, maybe going to do a big bore this winter so will see how things look at that time.
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Cosmic Razorback (06-10-2020)
#18
Those that follow me and the wife know that we seldom leave home if we are not going 200 miles or more. My bike has never been started to run up to the store and back two miles from home. Actually the last two rides before these parts were pulled was a 1052 mile Iron Butt in 19 hours immediately followed by a 575 mile round trip ride to Myrtle Beach with speeds from 45 to 75 MPH. So I do not think either of those contributed to my carbon build up.
#19
The following 2 users liked this post by VDeuce:
Cosmic Razorback (06-10-2020),
Silentgreyfellow (06-10-2020)