My 91 Strada had cracks in both mounts. Including chunks broken out of each mount. The widow who sold it to me had no information on it history. After much investigation I deduced it must have a left lowside crash that slid into something non movable. The left fairing was repainted and the left fork was bent. I swapped the original motor for one from a 99 ST4. Details are scattered in various posts. Someday I intend to rebuild the 851 motor with newer cases. We'll see. Right now the ST4 motor is awesome.
Thanx
Chris Mitchell
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1991 Ducati 851 Superbike, 916 motor, Custom FbF exhaust, ST4 header.
1998 BMW K1200RS
1998 Honda Superhawk