Hey Apple Jam,
That filter looks like it was cooked rather than just being dirty. Have you added a fuel injector cleaner to your fuel since you had that filter in? If you have then that is good information to know. I'm always pretty leery about those injector cleaning products.
KTM 400 XCRW with Thumper Racing 450 kit and 450 cam 2007
KTM 450 XCRW with Christini AWD and Plated 2008
KTM 990 Adventure 2008