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4.8/5 from 1329 CB riders Read Reviews
Honda CB900 CB750 CB650 caliper piston sealing ring 45108-300-003
Corrected parts fiche reference for SKU 29-0527
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60-day returnsEligible unused parts Free ground shippingUSA & Canada over $50
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Honda CB900 CB750 CB650 caliper piston sealing ring 45108-300-003

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5.0 ( 3 reviews)

Honda CB Caliper Piston Sealing Ring ~ Replaces 45108-300-003

29-0527
$7.95 USD
In stock Usually ships the same or next business day
Check model fitment View fitment
Questions about this part? Contact us 4.8/5 1,329 store reviews
Secure checkoutProtected payment
60-day returnsEligible unused parts Free ground shippingUSA & Canada over $50
Browse all parts

3 product reviews

Honda CB Caliper Piston Sealing Ring ~ Replaces 45108-300-003

Honda CB Caliper Piston Sealing Ring ~ Replaces 45108-300-003
$7.95 USD
Description

Replace your front caliper piston sealing ring with this Front Brake Caliper Piston Sealing Ring, replacing OEM #45108-300-003. Also fits the rear brake caliper on CB750F (1975‑78) Supersport in series 1, and rear caliper on CB750F (1979‑80) Supersport in series 2.

Key Features
• Front brake caliper piston sealing ring
• Replaces OEM #45108-300-003

Fitment / Compatibility

• Honda CB750K (1969‑76)
• CB750F (1977‑78) Supersport
• Also rear caliper: CB750F (1975‑78) Supersport

• Honda CB750F (1979‑80) Supersport
• CB750C (1981) Custom
• Also rear caliper: CB750F (1979‑80) Supersport

• Honda CB900C (1980) Custom

• Honda CB650C (1981) Custom

• Honda CB500K (1971‑73)
• CB500T (1975‑76)
• CB550F (1975‑77) Supersport
• CB550K (1974‑78)

• Honda CB400A (1978)
• CB400T (1980)
• CB400TII (1980)
• CB450K (1970‑74)

• Honda CB350F (1972‑74) Supersport
• CB400F (1975‑77) Supersport

• Honda CB350G (1973)
• CB360K (1974)
• CB360G (1974)
• CB360T (1975‑76)

Part Number: 29-0527

Read More
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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 CB750F 1977
Honda CB750F 1978
Honda CB750F Supersport 1979
Honda CB750F 1980
Honda CB750C 1981
Honda CB900C Custom 1980
Honda CB650C Custom 1981
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 CB400TII Hawk 1978
Honda CB400TIIZ Hawk 1979
Honda CB400TA Hawk 1980
Honda CB450K3 1970
Honda CB450K4 1971
Honda CB450K5 1972
Honda CB450K6 1973
Honda CB450K7 1974
Honda CB360T 1975
Honda CB360T 1976
Honda CB360G 1974
Honda CL360K0 1974
Honda CB350G 1973

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

How many brake-caliper piston sealing rings are included?

One hydraulic piston seal replacing Honda OEM 45108-300-003 is included for one compatible caliper piston. Use one new seal for every piston bore being rebuilt.

Is the piston seal the same as the external dust boot?

No. The square-cut hydraulic seal contains brake pressure and retracts the piston slightly; any separate dust boot protects the exposed piston area.

What should be checked during caliper-seal replacement?

Inspect the piston, bore and seal groove for corrosion or scoring, lubricate with brake-compatible fluid, fully bleed the system and hold pressure while checking for leakage before riding.

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