Top, a mounted case saver (this is prior to the black oxide sealer application)
Middle, this worn case saver is from a customer's bike after a chain link gave way. The case saver absorbed the brunt of the hit from the chain, but only suffered a nick and was reusable. Without the case saver, the owner probably would have a ruined engine case.
The case saver comes in two variants. One is for engine cases without the protrustion (above left) in the engine casing. Notice the older style engine case in the left picture, and then the protrusion behind the clutch pushrod port on the case (right picture). Model 1 of my case saver is for engine cases without the protrusion, and Model 2 is for engine cases with the protrusion. Model 2 has provisions for the hump and a different countershaft sprocket mounting hole pattern.
Don't be a lazy ass and ask me what kind of engine casing you have. There are too many models of bikes for me to keep track of the Model of case used. Take off your countershaft sprocket cover, clear away the grime in front of the countershaft sprocket and look at your engine casing. The effort will cost you a minute of your time.
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Desmo Times Case Saver Insert - $22
Ducati engine cases are made from Aluminum. With care, the cases will last indefinitely. Unfortunately, the death of many an engine casing is the chain. Should the chain break or a rear wheel tensioner fail the chain can gall the engine casing. If the casing gets compromised, it will have to be replaced, a repair that will cost thousands of dollars. The best prevention to such an occurrence is a steel insert that lines the area in front of the countershaft sprocket. Ducati used to make the item, but it came in bare steel (that quickly rusted) and cost almost $30. Ducati discontinued the item.
The Desmo Times Case Saver insert is made from steel and then black ozided and sealed to prevent rust. The inserts will work on most post-1990 Ducati with a clutch slave mounted next to the countershaft sprocket and running a 14-15 tooth countershaft sprocket. 16 tooth countershaft sprockets will NOT work with the case saver due to clearance problems. The inserts MAY work with previous generations of Pantah motor, but I haven't checked for fitment.
NOTE1: My inserts have been painted to ward off rust. You'll find that the buildup of chain lube and road grime further seals the case savers against the elements, and rust will be minimal.
NOTE2: If you have a variant with the clutch slave cylinder mounted to the right side of the motor, my case savers will NOT work.
NOTE3: Depending on your model year, you may need to use longer bolts to secure the countershaft sprocket cover. Ducati used different length bolts over the years.
NOTE4: The Case saver will not fit S2R800 motors due to lack of room in front of countershaft sprocket.
NOTE5: My case saver works with Desmo Times aftermarket sprocket covers and OEM sprocket covers. I can't vouch for other aftermarket sprocket covers.
NOTE6: The ST4 and ST4S models take the "hump" variant, regardless of whether the engine casing has a hump or not.
To mount the case saver, remove the 3 bolts securing the slave cylinder and pull the slave cylinder away from the engine casing enough so that the case saver can slide into the cavity in front of the countershaft sprocket. Use low-strength loc-tite when reinstalling the slave cylinder bolts.