No direct knowledge, but whenever I have parts interchange questions I can usually find the answers through google on the brand specific forums. I'll type into the google search bar "2001 zx9 front wheel interchange forum" and I'll find it pretty quickly
Assemblies where 41073-1633-DH is used 1998 NINJA ZX-6R (ZX600-G1) - Front Wheel 1999 NINJA ZX-6R (ZX600-G2) - Front Wheel 2001 NINJA ZX-9R (ZX900-E2) - Front Wheel 2002 NINJA ZX-6R (ZX600-J3) - Front Wheel 2002 NINJA ZX-9R (ZX900-F1) - Front Wheel 2003 NINJA ZX-9R (ZX900-F2) - Front Wheel
Last time I was over at RT cycles they had a whole bike Less engine, think he wanted $300 for it if I’m not mistaken.... The number is706-861-3000, Terrel is the man to talk to.