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Honda CB750 CB700SC CB650 master cylinder diaphragm 45520-MA5-671
VintageCB750 parts reference, SKU 08-0284. 1982 Honda CB750F (AU catalog; serial/type unverified) example. OEM 45520-MA5-672.
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Honda CB750 CB700SC CB650 master cylinder diaphragm 45520-MA5-671

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Load image into Gallery viewer, Honda CB750 CB700SC CB650 master cylinder diaphragm 45520-MA5-671
Load image into Gallery viewer, VintageCB750 parts reference, SKU 08-0284. 1982 Honda CB750F (AU catalog; serial/type unverified) example. OEM 45520-MA5-672.
5.0 ( 3 reviews)

Honda CB Front Master Cylinder Reservoir Diaphragm ~ Replaces 45520-MA5-671

08-0284
$11.50 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 Front Master Cylinder Reservoir Diaphragm ~ Replaces 45520-MA5-671

Honda CB Front Master Cylinder Reservoir Diaphragm ~ Replaces 45520-MA5-671
$11.50 USD
Description

Replace the diaphragm on your later DOHC CB's front master cylinder reservoir with this Front Master Cylinder Reservoir Diaphragm, replacing OEM #45520-MA5-671 / #45520-MA5-672 / #45520-H5M-630. Broad fitment across the 1981-83 DOHC CB750/F/C, CB700SC/CB750SC Nighthawk, CB900 family, CB1000C, CB1100F, CB650 family, CB550SC, CB400T, and CB450SC/CB450T.

Key Features
• Front master cylinder reservoir diaphragm
• Replaces OEM #45520-MA5-671 / #45520-MA5-672 / #45520-H5M-630
• Wide DOHC Honda fitment

Fitment / Compatibility

• Honda CB750K (1981‑82)
• CB750F (1981‑82) Supersport
• CB750C (1981‑82) Custom

• Honda CB700SC (1984‑86) Nighthawk
• CB750SC (1982‑83) Nighthawk

• Honda CB900F (1981‑82) Supersport
• CB900C (1982) Custom
• CB1000C (1983) Custom
• CB1100F (1983) Supersport

• Honda CB650 (1981‑82)
• CB650C (1981) Custom
• CB650SC (1982‑85) Nighthawk

• Honda CB550SC (1983) Nighthawk

• Honda CB400T (1981)
• CB450SC (1982‑83 / 1985‑86)
• CB450T (1982)

Part Number: 08-0284

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 1981
Honda CB750F 1981
Honda CB750C 1981
Honda CB750K 1982
Honda CB750F 1982
Honda CB750C 1982
Honda CB750SC Nighthawk 1982
Honda CB750SC 1983
Honda CB700SC Nighthawk 1984
Honda CB700SC 1985
Honda CB700SC 1986
Honda CB900F Supersport 1981
Honda CB900C 1982
Honda CB900F 1982
Honda CB1000C Custom 1983
Honda CB1100F Supersport 1983
Honda CB650 1981
Honda CB650 1982
Honda CB650SC Nighthawk 1982
Honda CB650C Custom 1981
Honda CB650SCD Nighthawk 1983
Honda CB650SCE Nighthawk 1984
Honda CB650SCF Nighthawk 1985
Honda CB550SC Nighthawk 1983
Honda CB400TB Hawk 1981
Honda CB450SCC Nighthawk 1982
Honda CB450SCD Nighthawk 1983
Honda CB450SCF Nighthawk 1985
Honda CB450SCG Nighthawk 1986
Honda CB450TC 1982

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

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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 CB750, CB900, CB1000 and CB1100 models fit front reservoir diaphragm 08-0284?

It fits 1981-82 CB750K, CB750F and CB750C; 1982-83 CB750SC; 1984-86 CB700SC; 1981-82 CB900F; 1982 CB900C; 1983 CB1000C; and 1983 CB1100F front master cylinder reservoirs.

Which CB400, CB450, CB550 and CB650 models fit diaphragm 08-0284?

It fits the 1981 CB400T, 1982 CB450T, 1982-83 and 1985-86 CB450SC, 1983 CB550SC, 1981-82 CB650, 1981 CB650C and 1982-85 CB650SC.

Which Honda OEM numbers identify the 08-0284 front master cylinder diaphragm?

It replaces Honda OEM 45520-MA5-671, 45520-MA5-672 and 45520-HM5-630. Match one of these references and the motorcycle's exact year and model before ordering because several Honda reservoir diaphragms have similar descriptions.

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