Just bought a '99 FXR2. It's my first Harley and appears to be all stock (except for the seat). It's in excellent condition but others I've seen have a tendency to belch oil out the crankcase breather if they've sat for a few weeks without being ridden. I assume this is due to oil seeping past the ball in the oil pump, so I was thinking of replacing the pump with one not prone to this behavior. Am I barking up the wrong tree? If not, does such well-sealed pump exist? Thanks.