Replace a stretched, worn, or noisy primary chain with this OEM-Quality Primary Chain, 50 links. A direct replacement for OEM #13610-393-004, this chain fits the CB750A Hondamatic plus the full late-'70s and early-'80s CB750 lineup including the Nighthawk. Primary chain condition affects power transfer and engine noise, don't skip this part during a major service.
Key Features
• OEM-quality primary chain, 50 links
• Replaces OEM #13610-393-004
• Direct replacement for factory chain
• Quiet, efficient power transfer
• Honda part name: Chain, Primary (50L) (Tsubakimoto)
Fitment / Compatibility
• Honda CB750A (1976‑78) Hondamatic
• Honda CB750K (1979‑82)
• CB750F (1979‑82) Supersport
• CB750L (1979) Limited
• CB750C (1980‑82) Custom
• Honda CB750SC (1982‑83) Nighthawk
Part Number: 01-0305
Check the listed model and year, then read any fitment notes in the description.
| Make | Model | Year |
|---|---|---|
| Honda | CB750A Hondamatic | 1976 |
| Honda | CB750A | 1977 |
| Honda | CB750A | 1978 |
| Honda | CB750K Standard | 1979 |
| Honda | CB750F Supersport | 1979 |
| Honda | CB750L Limited | 1979 |
| Honda | CB750K | 1980 |
| Honda | CB750F | 1980 |
| Honda | CB750C Custom | 1980 |
| Honda | CB750K | 1981 |
| Honda | CB750F | 1981 |
| Honda | CB750C | 1981 |
| Honda | CB750K | 1982 |
| Honda | CB750F | 1982 |
| Honda | CB750C | 1982 |
| Honda | CB750SC Nighthawk | 1982 |
| Honda | CB750SC | 1983 |
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
How many links does Honda primary chain 13610-393-004 have?
One 50-link internal primary chain replacing Honda OEM 13610-393-004 is included for the listed CB750 applications.
Does the 50-link primary chain fit every 1969-82 Honda CB750?
No. It fits the 1976-78 CB750A Hondamatic and the listed 1979-83 DOHC CB750 models. It is not the primary chain for the 1969-78 SOHC CB750K or CB750F; the CB750A is the specific pre-1979 exception shown in the fitment.