Went for a 20 mile ride in moderately dusty condition.  Pulled the dust tray from the separator to see what was in it. 

[2015 Z Force 800 53/Trail EPS]

Dust tray? You mean the KWT Separator doesn't eject the dust like the S&B does? I guess that the cost of not having a blower. Overall how did it do? Did the air filter stay pretty clean? 

Haven't had a chance to check the filter yet.  But, haven't driven it much since that photo was taken.  Been moving, trying to get the new place fixed up and set up.   I'll try to remember to do a follow up when I get a big enough "around-to-it" to cover working on the Z.

Thank you for posting the picture.I've been looking into both the
KWT and S&B for some time.I'm sure that both have thier advantages
but i'm leaning towards the S&B.
Why did you get a KWT?