I have been using these for a couple of years with no issues.
I have three of them on the bike since I am running the Rally Raid tanks. I did a week in Baja with tons of dust. Never a problem.
2009 KTM 690r Enduro SOLD
2002 RC51 SOLD
2010 KTM 990 Supermoto R SOLD
2014 KTM EXC 500