Opinions

[Bruce00]

131 front cylinder with 10K miles
Motor ran with no abnormal noise, found metal in oil at the 10K change

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[Ohio HD]

Who assembled the top end? Could these have been there from the start? Almost seems that a spinning hone could have made the gouges.

[Bruce00]

Dealer installed 131 kit at 1300 miles
At 3500 miles, couldn't put up with heat and did a Trask air/Bassani 2>1/Power Vision
Bye Bye warranty.......LOL

[kd]

Do you have pics of the piston and rings?  Did you do ma compression check and leak down test before disassembly? How was the other cylinder?  Any oil consumption or exhaust contaminating noted?

[Bruce00]

Do you have pics of the piston and rings?  Did you do ma compression check and leak down test before disassembly? How was the other cylinder?  Any oil consumption or exhaust contaminating noted?

I have them out in the truck, but nothing stands out. No broken rings, or piston deformation
Bike didn't smoke or use oil between changes. Rear cylinder showed heat witness marks but nothing stood out
Bike was in another state getting cam and a dyno tune, tech pulled the cam plate out and saw the oil pump chewed up. Pulled the crank sensor and metalic oil came out. There was no reason to check compression at that point. I might add that a couple weeks prior, the bike pulled 132/137 on a dyno.
It almost looks like the liner was moving with the piston for a sec, then caught and the top ring dug in??
IDK......all I know for sure is the bike was flagged for the PowerVision and Iam eating the costs

[SP33DY]

I bored and honed a pair of 114 cylinders to 4.180" and saw the same thing in one of the cylinders. It didn't show up until Iwas almost done honing it. I attributed it to a casting void in the liner.

[carpenterjoe]

I think Dave, up at JDs. Has seen that a few times.

[Don D]

So this is a MOCO steel lined cylinder?

[ziggy24]

Is that the bottom of the cylinder? Piston rocking maybe? Do the marks line up with the ring orientation on the piston?

[Admiral Akbar]

The gouges appear to be below the ring travel.  I'd say the boring bar picked up something hard in the sleeve and gouged the cylinder or the honing machine gouged the cylinder on insertion.  What does the spigot look like on the other side?

[Bruce00]

I bored and honed a pair of 114 cylinders to 4.180" and saw the same thing in one of the cylinders. It didn't show up until Iwas almost done honing it. I attributed it to a casting void in the liner.

Thats nice to know, thanks

[Bruce00]

I think Dave, up at JDs. Has seen that a few times.

Dave has seen mine, as he  was installing the cam and tuning.

Fast forward and mucho $$'s, Dave built me a TMan 130

[Bruce00]

So this is a MOCO steel lined cylinder?

Correct, out of HD's 131 kit

[Bruce00]

Is that the bottom of the cylinder? Piston rocking maybe? Do the marks line up with the ring orientation on the piston?

Top

The gouges appear to be below the ring travel.  I'd say the boring bar picked up something hard in the sleeve and gouged the cylinder or the honing machine gouged the cylinder on insertion.  What does the spigot look like on the other side?

I really don't know, but Iam giving the dealer tech the benefit of doubt, and say he wiped down the cylinders before installing and would have seen the damage.  Nothing abnormal on the spigot end.
I was hoping someone here might have seen this before and offered some insight.

At this point it doesn't matter any more as the MoCo flagged my vin for the PowerVision and the dealership has left me blowing in the wind. Dave at JD's Cycle, has built me a TMan 130 and Iam looking for another dealership to spend money in

[Thermodyne]

What's the skirt clearance on the piston, with the jug in plates.  Looks like the prisons were rocking in the bore.  Can also be from loose ring grooves, but not really enough miles for that.

[CVOThunder]

Has me wondering what mine look like with 10,000 miles. Thinking about upgrading flywheels to Darkhorse keeping stock stroke but better rods. Grudge box as well. Meh, we'll see.