Running a 5/8-11 tap (with a nut and washer threaded onto it) into the sludge tube is the easiest way to pull the tube. If you don't have that size tap, you can make a puller from an old bolt or a piece of threaded rod and a 1/4" grub screw, as invented by John Healy. That's what I used. CLICK

'64 TR6R Plus some Twins from other countries (U.S., Germany, Japan)