I spent ages looking , and ypu have three choices ;-
1) Halfords do a self adjusting thing that looks like a spider .....
2) The old stap thing , but you will get clearance problems
3) A screwdriver .......
Ducati employ apes on steriods to put on the filters ....
After trying various other methods 3) worked for me. I wish I hadn't wasted 4 hours before using the screwdriver ......
