you can download manual service with link above.
your scooter year model should be in the label, you will see it by remove a small plastic on legshield, Yamaha Razz is sh50(?) a letter next to it is stand for the year by yamaha code. On which CDI is match for your engine, 89-94 is this part # 3JG-85540-00-00, and 95-2000 part #3JG-85540-10-00 . I'd say they are interchangeable, but i maybe wrong. I do have one SH50K which is 1998, if you need parts for it, let me know.