Did you ever figure out what it was? Have the same issue on my 08 ds450. Ready to tear the motor apart but would rather not If I don’t need to.Yeah checked the oil tank when I did oil change. I've only just aquired the bike so not sure how long it's been going for? I understand that engines are noisy but is a very distinguished sound. And when I switch engine off it makes one last louder tic when it stops