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So i have ducati 1098 year 2007. I just bought another set of 1098 cylinders and pistons they should be from 2008.
Piston rings from 2007 are same as in manual. So top piston ring has chamfer on inside top edge, and second piston ring has outside bottom edge recessed (dont know how to describe :D )

Piston rings from 2008 looks like they are all rectangualr in cross section.

Did somebody also noticed piston rings with with rectangular cross section in 1098 series bikes??
 

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So i have ducati 1098 year 2007. I just bought another set of 1098 cylinders and pistons they should be from 2008.
Piston rings from 2007 are same as in manual. So top piston ring has chamfer on inside top edge, and second piston ring has outside bottom edge recessed (dont know how to describe :D )

Piston rings from 2008 looks like they are all rectangualr in cross section.

Did somebody also noticed piston rings with with rectangular cross section in 1098 series bikes??
Go to Ducati Omaha and check the part numbers
 

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Discussion Starter #3
I did this and part numbers are the same. Also markings on piston rings are same. I checked again today and noticed that only difference is that chamfer on the top inside corner of top piston ring
 

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Even if the early 1098s used different ring design and part number, once the new design is implemented all the catalogs are changed to utilize the new number. Only sometimes do they use supercessions instead of just replacing the part number altogether.
 

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The latest catalog number is: 12221673A

This part replaces following part no.: 12221672A, 12221432A, 12221431A, 12221433A
 
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