there is no inherent cause for any float needle to fail other than damaged seating, debris. foreign
bodies of a float problem
have to say with the Vit6 on solex for 2 yrs and then 18 yrs on strombergs the only flooder i have had was the 2000 on darn HS4s and that was the float platform wear ridges ,new floats and thats been surprisingly fine for 8 years regardless of who's or what E fuel is used
both just start on the button once you hand prime the chambers full.
alway use stuff like gates barricade hose and the dreaded slivers wont get generated
use cheap crap of a market place and expect headaches
the 2000 is still on original 50yr old fuel hose ....stuff triumph made to a specification that works
so much hose sold with reputed R numbers is generally ......just rubbish
Pete