Originally Posted by C5!
Same issue. bike with 56,000 km. pulled out the pump assembly, removed the fuel filter which was effectively clogged!! Did the same mod as OP, replaced by an external filter. temporary repair though because here in the middle of nowhere at the border of Brazil and Venezuela, can't find appropriate filter nor 1/4" fuel line. Used temporarily a pressure air/water hose.
Tested the bike and is now running fine. Hopefully mod will last until I reach Caracas where I can find appropriate filter and hose.
As far as I can recall, the fuel line is 5/16".