Dress up your steering stem with this Joker Machine Black Steering Stem Nut, 30mm hex, replacing OEM #90304-415-000. High-quality CNC-machined and made in the USA. Broad fitment covering the SOHC CB750, late-model CB750F, CB500/CB550, CB450 family, CB400 and CB350F/CB400F Supersport, CB350/CL350/SL350, and CB360T.
Key Features
• Joker Machine black steering stem nut
• 30mm hex
• Replaces OEM #90304-415-000
• CNC-machined, made in USA
Fitment / Compatibility
• Honda CB750K (1969‑78)
• CB750F (1975‑78) Supersport
• CB750A (1977‑78) Hondamatic
• Honda CB750F (1979‑82) Supersport
• Honda CB500K (1971‑73)
• CB500T (1975‑76)
• CB550K (1974‑78)
• CB550F (1975‑77)
• Honda CB400A (1978)
• CB400T (1980‑81)
• CB450K (1970‑74)
• CB450T (1982)
• CL450K (1968‑74)
• Honda CB350F (1972‑74) Supersport
• CB400F (1975‑77) Supersport
• Honda CB350K (1968‑72)
• CL350K (1968‑73)
• SL350 (1969‑73)
• CB360T (1975‑76)
Part Number: 12-0073
Check the listed model and year, then read any fitment notes in the description.
| Make | Model | Year |
|---|---|---|
| Honda | CB750K Standard | 1969 |
| Honda | CB750K | 1970 |
| Honda | CB750K | 1971 |
| Honda | CB750K | 1972 |
| Honda | CB750K | 1973 |
| Honda | CB750K | 1974 |
| Honda | CB750K | 1975 |
| Honda | CB750F Supersport | 1975 |
| Honda | CB750K | 1976 |
| Honda | CB750F | 1976 |
| Honda | CB750K | 1977 |
| Honda | CB750F | 1977 |
| Honda | CB750A | 1977 |
| Honda | CB750K | 1978 |
| Honda | CB750F | 1978 |
| Honda | CB750A | 1978 |
| Honda | CB750F Supersport | 1979 |
| Honda | CB750F | 1980 |
| Honda | CB750F | 1981 |
| Honda | CB750F | 1982 |
| Honda | CB550K0 | 1974 |
| Honda | CB550K1 | 1975 |
| Honda | CB550K2 | 1976 |
| Honda | CB550K3 | 1977 |
| Honda | CB550K4 | 1978 |
| Honda | CB550F1 | 1975 |
| Honda | CB550F2 | 1976 |
| Honda | CB550F3 | 1977 |
| Honda | CB500K0 | 1971 |
| Honda | CB500K1 | 1972 |
| Honda | CB500K2 | 1973 |
| Honda | CB400F | 1975 |
| Honda | CB400F | 1976 |
| Honda | CB400F | 1977 |
| Honda | CB350F0 | 1972 |
| Honda | CB350F0 | 1973 |
| Honda | CB350F1 | 1974 |
| Honda | CB500T Twin | 1975 |
| Honda | CB500T Twin | 1976 |
| Honda | CB400A | 1978 |
| Honda | CB400TA Hawk | 1980 |
| Honda | CB400TB Hawk | 1981 |
| Honda | CB450TC | 1982 |
| Honda | CB450K3 | 1970 |
| Honda | CB450K4 | 1971 |
| Honda | CB450K5 | 1972 |
| Honda | CB450K6 | 1973 |
| Honda | CB450K7 | 1974 |
| Honda | CL450K1 | 1968 |
| Honda | CL450K2 | 1969 |
| Honda | CL450K3 | 1970 |
| Honda | CL450K4 | 1971 |
| Honda | CL450K5 | 1972 |
| Honda | CL450K6 | 1974 |
| Honda | CB360T | 1975 |
| Honda | CB360T | 1976 |
| Honda | CB350K0 | 1968 |
| Honda | CB350K1 | 1969 |
| Honda | CB350K2 | 1970 |
| Honda | CB350K3 | 1971 |
| Honda | CB350K4 | 1972 |
| Honda | CL350K0 | 1968 |
| Honda | CL350K1 | 1969 |
| Honda | CL350K2 | 1970 |
| Honda | CL350K3 | 1971 |
| Honda | CL350K4 | 1972 |
| Honda | CL350K5 | 1973 |
| Honda | SL350K0 Scrambler | 1969 |
| Honda | SL350K0 Scrambler | 1970 |
| Honda | SL350K1 Scrambler | 1971 |
| Honda | SL350K2 Scrambler | 1972 |
| Honda | SL350K3 Scrambler | 1973 |
No listed models match your search.
Free ground shipping over $50
To the USA & Canada. In-stock orders usually ship from our own warehouse the same or next business day.
| Destination | Delivery time |
|---|---|
| USA | 4–7 business days |
| Canada | 2–6 business days |
Ground shipping includes tracking, emailed when your order ships. Need it sooner? Express options are available at checkout.
60-day returns on eligible parts
No restocking fees. Eligible parts must be unused, uninstalled, unaltered and complete. The 60-day window starts when your order is delivered.
Electrical parts are excluded from standard returns. Check return eligibility.
Start your return below. Wait for our instructions before mailing a part back.
Start a returnOther shipping options
Canada Post Economy: Available at checkout for select small items. Allow 1–3 weeks for delivery. No tracking or insurance is included.
Outside the USA & Canada: Delivery times vary by destination and shipping method. Buyers are responsible for applicable duties, taxes and import fees. We cannot mark orders as gifts.
Frequently Asked Questions
Which Honda OEM steering-stem nut does Joker Machine 12-0073 replace?
The black CNC-machined steering-stem nut replaces Honda OEM 90304-415-000 and has a 30 mm hex.
Does steering-stem nut 12-0073 fit every 1979-1982 DOHC Honda CB750?
Verified 1979-1982 DOHC CB750 fitment is for the CB750F Supersport. The CB750K, CB750C and CB750L are not included in the verified DOHC applications, so do not order by engine family alone.
Which SOHC Honda CB750 models fit Joker Machine steering-stem nut 12-0073?
It fits the 1969-1978 CB750K, 1975-1978 CB750F Supersport and 1977-1978 CB750A Hondamatic, in addition to the other specifically named Honda CB models and years.