BA9s should fit, but LEDs are not recommended in headlight buckets due to the heat generated by the headlight bulb... So technically there's no "right one" for HL bucket applications.
Current: 93 R100GS, 04 XR650L
Prior: 73 CB350, 77 R100/7, 83 R100RT
I love every motorcycle I've owned and even some that I haven't.