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  • Honda CB Front Master Cylinder Assembly ~ 5/8 in.
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Honda CB750 CB550 CB400F front master cylinder assembly 5 8 in.
Honda CB750 CB550 CB400F front master cylinder assembly 5 8 in.
Honda CB750 CB550 CB400F front master cylinder assembly 5 8 in.
Honda CB750 CB550 CB400F front master cylinder assembly 5 8 in.
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Honda CB750 CB550 CB400F front master cylinder assembly 5 8 in.

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5.0 ( 5 reviews)

Honda CB Front Master Cylinder Assembly ~ 5/8 in.

08-0253
$99.95 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 1,347 store reviews
Secure checkoutProtected payment
60-day returnsEligible unused parts Free ground shippingUSA & Canada over $50
Browse all parts

5 product reviews

Honda CB Front Master Cylinder Assembly ~ 5/8 in.

Honda CB Front Master Cylinder Assembly ~ 5/8 in.
$99.95 USD
Description

Drop in a factory-look master cylinder with a performance piston size using this Front Brake Master Cylinder Assembly. Black body with silver lever, custom-manufactured with a 5/8" piston size for improved, more sensitive braking compared to the stock unit. Designed to look similar to the original CB750 master cylinders.

Works as a direct stock-look replacement on a wide range of classic Hondas through the mid-'70s. For some later-'70s bikes (CB750K 1978, CB750F 1977-78, CB750A 1977-78), this master cylinder does not have the brake light switch that those OEM types had, so you'll need to add our #29-7002 hydraulic brake light switch.

Note: our master cylinder reservoir cap (#29-0054) pairs beautifully with this unit for a more original look.

Key Features
• Front brake master cylinder assembly
• Black body, silver lever
• 5/8" piston for more sensitive braking
• Factory-look CB750 styling
• Requires #29-7002 brake light switch on late-'70s models

Fitment / Compatibility
• Honda CB750K (1969‑77)
• CB750F (1975‑76) Supersport
• CB750A (1976) Hondamatic
• CB650 (1979‑82)
• CB650C (1980‑81)
• CB550F (1975‑77)
• CB550K (1974‑78)
• CB500K (1971‑73)
• CB500T (1975‑76)
• CB450T (1982)
• CB400F (1975‑77)
• CB400T (1980‑81)
• CB360G (1974)
• CB360T (1975‑76)
• CB350F (1972‑74) Supersport
• CB350G (1973)

Also fits (requires separate brake light switch #29-7002):
• CB750K (1978)
• CB750F (1977‑78) Supersport
• CB750A (1977‑78) Hondamatic

Part Number: 08-0253

Read More
Read Less

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 CB750F 1977
Honda CB750A 1977
Honda CB750K 1978
Honda CB750F 1978
Honda CB750A 1978
Honda CB350F0 1972
Honda CB350F0 1973
Honda CB350F1 1974
Honda CB350G 1973
Honda CB360G 1974
Honda CB360T 1975
Honda CB360T 1976
Honda CB400F 1975
Honda CB400F 1976
Honda CB400F 1977
Honda CB400TA Hawk 1980
Honda CB400TB Hawk 1981
Honda CB450TC 1982
Honda CB500K0 1971
Honda CB500K1 1972
Honda CB500K2 1973
Honda CB500T Twin 1975
Honda CB500T Twin 1976
Honda CB550F1 1975
Honda CB550F2 1976
Honda CB550F3 1977
Honda CB550K0 1974
Honda CB550K1 1975
Honda CB550K2 1976
Honda CB550K3 1977
Honda CB550K4 1978
Honda CB650 1979
Honda CB650 1980
Honda CB650 1981
Honda CB650 1982
Honda CB650C Custom 1980
Honda CB650C Custom 1981

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 piston size does the front master cylinder use?

The master cylinder uses a 5/8-inch piston.

Does this master cylinder include a brake-light switch?

No. It does not include a brake-light switch; later applications originally equipped with one require a separate hydraulic brake-light switch.

How do I add a brake-light switch when using this master cylinder?

For later applications that require a separate switch, use banjo-bolt hydraulic switch #29-7002. It uses an M10 x 1.25 thread and replaces the existing banjo bolt at a compatible single-banjo fitting. Use the correct sealing washers, bleed the brake if the circuit is opened, and confirm firm pressure, no leaks, and correct brake-light operation before riding.

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