Don't trust me, look in the parts manual, mc16 brake disc 45120-KV3-000, mc18 brake disc 45120-KV3-000.

All the grey sporty Honda 400's from the late 80's/early 90's (VFR's RVF's, CBR's share the same discs, these are the same size and direct swap with most other Honda's from that era, CBR600, Fireblade and even RS250.

The NSR discs are smaller.
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