To answer your question no I don't have clamps on my in-line filters. We are dealing with a gravity feed system (no pressure) and the tygon line is very tight so so far have not used clamps. If leaks pop up I will clamp at that time but it has been over 6 months on both of my bikes and neither leaks around the in-line filters! But if you want to play it safe, go for it.

Glenn

1974 CT90 K5
2012 Honda Silver Wing
2005 Honda Gold Wing 30th Anniversary Edition

American Legion Riders Post 12
 Wickenburg, AZ

BZMF #091, English Chapter

" Keep brotherhood till die "