Hinomaru...any reason that would not work in my K3? I see your CB750 list stops at the K2.
Update: I just spoke with my dealer and he checked the Honda site and still available. So I ordered one as my low beam is out in my K1 anyway. Then once I get it I will check to see if it will fit the K3 and will report back. He said retail was $10.
I’m showing a different part number for your K3 headlight which is: 33321-341-701 and costs around $90.00, I have never ordered one of these to compare the differences between the two part numbers.
I don’t know if the earlier 33321-568-671AH will fit and/or perform as Honda originally intended in your K3.
The part number cross reference shows that 33321-341-701 also fits the following models:
CB550 A MOTORCYCLE, JPN, VIN# CB550K-1000001
CB550F A MOTORCYCLE, JPN, VIN# CB550F-1109886
CB550F A (76) MOTORCYCLE, JPN, VIN# CB550F-2000003
CB550F A (77) MOTORCYCLE, JPN, VIN# CB550F-2100001
CB550K A (76) MOTORCYCLE, JPN, VIN# CB550K-1230001
CB550K A (77) MOTORCYCLE, JPN, VIN# CB550K-2000007
CB550K A (78) MOTORCYCLE, JPN, VIN# CB550K-2100001
CB550K1 A MOTORCYCLE, JPN, VIN# CB550K-1200001
CB650 A (79) MOTORCYCLE, JPN, VIN# RC03-2002472
CB650 A (80) MOTORCYCLE, JPN, VIN# RC05-2100002
CB650C A (80) MOTORCYCLE, JPN, VIN# RC05-2000008
CB750A A (76) MOTORCYCLE, JPN, VIN# CB750A-7000001
CB750A A (77) MOTORCYCLE, JPN, VIN# CB750A-7100001
CB750A A (78) MOTORCYCLE, JPN, VIN# CB750A-7200001
CB750F A MOTORCYCLE, JPN, VIN# CB750F-1000002
CB750F A (76) MOTORCYCLE, JPN, VIN# CB750F-2000003
CB750F A (77) MOTORCYCLE, JPN, VIN# CB750F-2100011
CB750F A (78) MOTORCYCLE, JPN, VIN# CB750F-2200001
CB750F A (79) MOTORCYCLE, JPN, VIN# RC04-2000023
CB750F A (80) MOTORCYCLE, JPN, VIN# RC04-2100003
CB750K A (76) MOTORCYCLE, JPN, VIN# CB750-2540001
CB750K A (77) MOTORCYCLE, JPN, VIN# CB750-2700009
CB750K A (78) MOTORCYCLE, JPN, VIN# CB750-2800001
CB750K A (79) MOTORCYCLE, JPN, VIN# RC01-2000001
CB750K A (80) MOTORCYCLE, JPN, VIN# RC01-2100005
CB750K3 A MOTORCYCLE, JPN, VIN# CB750-2200001
CB750K4 A MOTORCYCLE, JPN, VIN# CB750-2300001
CB750K5 A MOTORCYCLE, JPN, VIN# CB750-2500001
CB750L A (79) MOTORCYCLE, JPN, VIN# RC01-3000006
CX500 A (78) MOTORCYCLE, JPN, VIN# CX500-2000001
CX500 A (79) MOTORCYCLE, JPN, VIN# CX500-2100006
CX500C A (79) MOTORCYCLE, JPN, VIN# PC01-2000017
CX500C A (80) MOTORCYCLE, JPN, VIN# PC01-2100018
CX500D A (79) MOTORCYCLE, JPN, VIN# PC01-4000005
CX500D A (80) MOTORCYCLE, JPN, VIN# PC01-4100002
GL1000 A MOTORCYCLE, JPN, VIN# GL1-1000001
GL1000 A (76) MOTORCYCLE, JPN, VIN# GL1-2001483
GL1000 A (77) MOTORCYCLE, JPN, VIN# GL1-3000001
GL1000LTD A (76) MOTORCYCLE, JPN, VIN# GL1-2035001