I've seen a lot of the chrome lock nuts for the mirror shafts get buggered from over tightening, wrong tool used, etc. Then they rust and look like hell. The nut isn't available separately. But I ran across a lock nut part # recently that's got the CB500 product code in the part number but isn't listed for the CB500, not even on the original 1971 fiche as far as I can tell. It's listed for the models shown below. However, this nut is identical to the original on all of Honda's chrome 10mm mirror shafts at least as far back as 1969. Cheap, too. (around $3). Part # 90314-323-000. The chrome on these nuts looks show quality. Just FYI...
Stu
Part # = 90314-323-000
Part Description = NUT, LOCK
Model Count = 23
CMX250CD-G 1986 250 Honda Rebel 250 LTD Street
CMX250C-F 1985 250 Honda Rebel 250 Street
CMX250C-G 1986 250 Honda Rebel 250 Street
CMX250C-H 1987 250 Honda Rebel 250 Street
CMX450C-G 1986 450 Honda Rebel 450 Street
CMX450C-H 1987 450 Honda Rebel 450 Street
VT1100C-1 2001 1100 VT1100C Shadow Spirit 1100 Street
VT1100C-2 2002 1100 VT1100C Shadow Spirit 1100 Street
VT1100C2-1 2001 1100 VT1100C2 Shadow ACE 1100 Street
VT1100C2-2 2002 1100 VT1100C2 Shadow ACE 1100 Street
VT1100C2-3 2003 1100 VT1100C2 Shadow ACE 1100 Street
VT1100C2-4 2004 1100 VT1100C2 Shadow ACE 1100 Street
VT1100C2-5 2005 1100 VT1100C2 Shadow ACE 1100 Street
VT1100C2-6 2006 1100 VT1100C2 Shadow ACE 1100 Street
VT1100C2-7 2007 1100 VT1100C2 Shadow ACE 1100 Street
VT1100C2-Y 2000 1100 VT1100C2 Shadow ACE 1100 Street
VT1100C-3 2003 1100 VT1100C Shadow Spirit 1100 Street
VT1100C3-1 2001 1100 VT1100C3 Areo 1100 Street
VT1100C3-2 2002 1100 VT1100C3 Areo 1100 Street
VT1100C-4 2004 1100 VT1100C Shadow Spirit 1100 Street
VT1100C-5 2005 1100 VT1100C Shadow Spirit 1100 Street
VT1100C-6 2006 1100 VT1100C Shadow Spirit 1100 Street
VT1100C-7 2007 1100 VT1100C Shadow Spirit 1100 Street
