My cousin is installing the primary on his 1985 FXRS. Took it down 3 weeks ago to have cases chromed. After assembly up to outer case he had a washer left over. It is a flat washer with bevels on both sides. 7/8" od, 1/2" id, 3/16" thick. One side has a bevel around the outer circumference and the other side has a bevel around the inside circumference of the hole. I can't post a picture. From this lame description can anyone tell where this washer might go. I keep telling him to get a manual but after dumping $700.00 on chrome he can't right now. Thanks.