Cylinder scuffing

[Speeddog]

Has the motor been run under load?

Or just with the bike stationary?

[Ddan]

New rings won't stop you from needing to possibly take the motor out for a different reason.

Isn't that the motor that came with that bike that had been so carefully looked after?

You'll be bored next winter too.

Same motor

Has the motor been run under load?

Or just with the bike stationary?

It hasn't been run under load since the last tear-down last winter

[Speeddog]

Have the rings been run under load?

[Ddan]

The pistons and rings were put in and have been run since '08.  The motor was torn down for valve guides last winter, cylinders off as well, and it hasn't been run under load since then.

[Ddan]

Thanks again for the input, and here's the latest.
I got the cylinders and pistons to Eric at Clubhouse  and learned a bit.  "Drop-in" pistons will drop in, doesn't mean they'll be a good fit.  Cylinder to piston clearance was .005+ and ring end gap was probably twice what it should be.  When I was putting the motor together I knew Ducati matched pistons to the cylinders, A, B, or C and I wondered how that was dealt with using aftermarket pistons, but never went further than wondering about it.  I have B cylinders, and I guess it makes sense that JE sizes the piston to the tightest cylinders; Eric checked my pistons to an A cylinder he had and it was much tighter.  So I've probably had those compression numbers since I put it together and it ran pretty well.  My options were (1) to hope to find a set of good A cylinders on Ebay or wherever, or (2) have my cylinders re-plated and sized to my pistons.  It seemed that the Ebay option still left a lot of chance to have a less then good result so #2 it is.  It'll be interesting to see the new compression numbers.