Purchased a pair of KTM450 screw filler filters from split stream. http://www.split-stream.com/products/splitstream-fuel-filter-honda-crf-kawasaki-kxf-ktm-sxf-efi I figured I'd work out how to fit them later... In the neck is almost impossible. Very little room to put a taper sleeve etc. Next I thought about glueing or using a band and screws to secure from underside. Two weeks of contemplation later...Bit the bullet after reading up on plastic welding. Worried about what part of the operation was going to turn to crap and very surprised to find that 30 minutes after starting the filters were installed and back in the tank. Virtually painless Fuel filter change was harder. Without Orange crush I'd have been stumped for ages on how to pull that white plastic thing apart for the little round filter! See pic below. I used a little weld (really just heating and spreading material between the 2 parts) each side. Just the two little ones and it was securely held. Next was fully welding all the way around. Filters installed and back on bike. First fill I noticed a bit of foaming up while filling. That was near the top of tank fill so no big deal.