Oil loss Suzuki GSX-R 750 K6

Hi, my bike has now made winter clear. Unfortunately, when I was cleaning, I found my motorcycle oiling. First place is at the steering chain tensioner and second place is right at the front of the engine (where the balancing shaft is located). There is a rubber stopper on the left side (simmerring). Exactly there it oils. To change this rubber stopper, however, the whole engine has to be disassembled Now my question, is the problem with you also or is it known???? Thank you for your answers…. Well, the engine’s got 11000km down.