Yes, you can get at it without pulling the engine, but you have to drop the oil pan to get at the pump.
Check your oil tank after your bike has been parked for a while, a couple hours, a day, a couple days, a week. See how fast it is leaking down into the sump. Hows your oil pressure in the first minute after starting?
There are lots of threads on leak stopper valve.
Its really not a big deal but I have heard that the necessary repair part might be unobtainable.