I replaced the oil pan because the previous owner stripped the threads of the other oil pan and helicoil didn’t work. Apart from that the bike has been running good, starts right up clutch engages properly and the only thing it has is a tune. It did have original oil pan because there were no signs of previous replacement unless the motor has been dropped. And the pin was all the way at the bottom of the oil pan, it was visible through oil drain hole. My best guess from looking at diagrams it’s a pin from the clutch starter