You can access them without taking the bike apart with a little fiddling. I used a syringe with a drinking straw pushed onto the end of it, filled with 3 in 1 oil. I had tried WD40, which worked for a few weeks, but after using the oil I had no recurrence before I sold the bike several months later. Rear one can be accessed under the tank after removing the seat. Front one from the front left side of the bike.