what does the (UR) mean on the yamaha microfiche, i know the AP stands for alternate part,and STD stands for standard
If I tell you that UR= high altitude............. does that make any sence as to what you are looking at?????????
Kgmz
New member
I am not sure what UR means, could possibly be User Replacement, you will only see it on parts like different weights for the primary, rivets for primary, different thickness washers for secondary, and so on.