[Ducati Scotty]

Air cooled bikes are hard on oil.  Frequent changes and synthetic oil both help.

[Russ]

Every 2,000 mi. or engine rebuild.....

[Carlsberg Wordsworth]

I'd asked about filter change on every other oil change before and I've decided on that. Motul 5100 says every 6 months/6000k (3700ish miles) so for me, will probably be every 6 months.

[mc35803]

..... give a guy an excuse to hang out in the garage and drink beer and stare at your bike.

I have that same staring at the bike issue.....