New here what the h--- is sumping never heard that term before.

 

Just use the search facility on this forum to find out more than you'll ever want or need to know. The following thread is a good place to start: https://www.hdforums.com/forum/milwa...n-sumping.html

 

Pump went bad on my 113" EVO, sumoed oil, changed the pump out, no problem...

 

Sumping: the build up of oil in the crankcase of a dry sump motor. Crank has to spin in an oil bath, robbing power and creating heat, then melting motor parts.