75143338 - Order 1 set and you will get 2 OEM crankshaft bearings from DUCATI for your bevel drive twins.
These are the best (only real?) choice of main bearing to use in your bevel drive featuring polymide plastic cage 15 degree angular bearings made in England by RHP who have always supplied Ducati with main bearings. The phenolic material found in the original bearings 40 years ago have been replaced by modern polymide plastic.
These are as delivered from Ducati to us here at Bevel Heaven in the DUCATI box as shown - you can't get any more 'correct' than that.