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  • Honda CB750 / CB450 Front Friction Disc ~ Replaces 45120-392-000
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Honda CB750 CB450 front friction disc 45120-392-000
Honda CB750 CB450 front friction disc 45120-392-000 — OEM fiche location reference
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60-day returnsEligible unused parts Free ground shippingUSA & Canada over $50
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Honda CB750 CB450 front friction disc 45120-392-000

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Load image into Gallery viewer, Honda CB750 CB450 front friction disc 45120-392-000
Load image into Gallery viewer, Honda CB750 CB450 front friction disc 45120-392-000 — OEM fiche location reference

Honda CB750 / CB450 Front Friction Disc ~ Replaces 45120-392-000

30-3066
$239.00 USD
Currently out of stock
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Secure checkoutProtected payment
60-day returnsEligible unused parts Free ground shippingUSA & Canada over $50
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Honda CB750 / CB450 Front Friction Disc ~ Replaces 45120-392-000
$239.00 USD
Description

Replace your SOHC CB750 or CB450K front brake rotor with this Front Brake Rotor, replacing OEM #45120-392-000 / #45120-300-040 / #45120-341-000.

Key Features
• Front brake rotor
• Replaces OEM #45120-392-000 / -300-040 / -341-000

Fitment / Compatibility

• Honda CB750K (1969‑78)
• CB750F (1975‑76) Supersport
• CB750A (1976‑77) Hondamatic

• Honda CB450K (1970‑71)

Part Number: 30-3066

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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 CB750A Hondamatic 1976
Honda CB750K 1977
Honda CB750A 1977
Honda CB750K 1978
Honda CB450K3 1970
Honda CB450K4 1971

Free ground shipping over $50

To the USA & Canada. In-stock orders usually ship from our own warehouse the same or next business day.

Estimated ground delivery after your order ships
DestinationDelivery time
USA4–7 business days
Canada2–6 business days

Ground shipping includes tracking, emailed when your order ships. Need it sooner? Express options are available at checkout.

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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.

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Other 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

What Honda front brake rotor does part 30-3066 replace?

One front brake disc cross-referenced to Honda OEM 45120-392-000, 45120-300-040 and 45120-341-000 is included for the compatible SOHC CB750 and CB450K applications.

What should be inspected when replacing the front brake rotor?

Measure the old rotor and replacement mounting for thickness, runout and hub seating, inspect the fasteners, caliper and wheel bearings, and install compatible pads rather than running contaminated or unevenly worn pads on a new disc.

What must be checked before riding with a new brake rotor?

Torque the rotor and caliper hardware to the Honda procedure, verify free wheel rotation and firm hydraulic pressure, then bed the pads to their instructions. Stop if the brake pulses, drags or leaks.

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