> why does the oil stick on my 883 sportster pop out when the motor is running?

why does the oil stick on my 883 sportster pop out when the motor is running?

Posted at: 2015-04-14 
It can also be a bad crank seal between the primary and case , behind the compensating sprocket .

That's what caused the same problem on my dog's Sportster

The engineering answer is unlike a lot of other brands, the dipstick does not screw into the engine case. Harley dipsticks often have chrome-plated skull heads which do not to fix the problem, but they sure are shiny and macho.... I guess the thumbs downs are for stating the facts. Oh well.

Combustion blowby from worn out piston rings, or burned pistons.

Your crankcase pressure is too high. Check/clean PCV system or case breather (whichever it has).

crank case vent ....( P C V )