Oil filters for belt-drive engines: same as fitted to Citroen 2CV & Peugeot 205 & 309 - UFI part number (23.105.00) corresponds with; AC Delco FX0011 (was X4A); Motorcraft EFL 47; Champion H101; NAPA: 1352 (1352NAPA and 551352 on the box);
Cooper Z64; Powertrain FL125; Fiaam FT4654, FT 4847 or PA7059; Purflux LS187; Fram PH6074 (was PH2839, PH2864A); Purolator ML16829C (was FC 103 or OC 5); Halfords HOF216; Tecafilter Ref OC5; K & N KN-153; Technocar R12, R72, R434; Knecht OC 5 (equivalent to Ducati #065149960 and #090549960); TJ FB2094; Mann & H W712/9, W712/11; Unipart GFE 201.
Before using any of the above please be aware, early 650 Cagivas with Ducati engines sometimes do not accept the 2CV car filter, the threads differ. In this instance you will probably find that the following 3/4" UNF thread) will fit; TJ filters: FB5311 and Fram: PH4482. The Fram filter is slightly longer and means you have to leave off the sump guard (Elefant), or make spacers.