Well, if you live in So Cal., I'd suggest you donate you bike to K&N for them to manufacture a filter. I looked on their web site a few weeks ago, and the 10R is on their wanted list.
I'm on the CA central coast, but there is no way in hell I'd give my bike up. Not even for a free filter.
Any of you other 10R pilots willing to part with you ride for a week or however long it takes them to manufacture a filter??????
Indian 25cc (6 yrs old)
Suzi 50cc Trailhopper
2 - 750 Vulcans
'93 ZX-7 (raced)
'04 ZX-10R (Black)(35 yrs old)