I have a 2014 boulevard c50 boss and am needing to change my oil and differential fluid. I recently moved and lost my owners manual. Im at 9500 miles on the bike and my last oil change was at 6000 so its time.y only issue is i dont know any specs on the fluid or how much to use. The shop is quoting me at 140$ for the job and im sure i can do it cheaper myself. Can someone please help me out here? And also if anyone has any how tos on the differential fluid change that would help alot. I really appreciate any positive feedback.