VintageCB750 Supplying CB Riders Since 2010

About Us Why Us? Reviews Shipping Info Returns Contact Us
Wish Lists
0 My Cart

Your cart is currently empty.

Browse all parts
Total (USD): $0.00
View cart
Menu
Search
Wish
Cart 0
My motorcycle Choose your Honda CB model

Search parts

Searching all Honda CB parts

Example: brake pads or oil filter.
4.8/5 from 1353 CB riders Read Reviews
  • Home
  • Honda CB750F Front Master Cylinder Reservoir Diaphragm ~ Replaces 45520-371-003
Honda CB750F front master cylinder reservoir diaphragm 45520-371-003
SKU 08-0283 — approved OEM fiche location reference (NIGHT20261026-0093)
Master cylinder reservoir diaphragm – product view
Honda CB750F Front Master Cylinder Reservoir Diaphragm – rear view
Honda CB750F Front Master Cylinder Reservoir Diaphragm – left view
Secure checkoutProtected payment
60-day returnsEligible unused parts Free ground shippingUSA & Canada over $50
1 / 6 · Photo
Honda CB750F front master cylinder reservoir diaphragm 45520-371-003

Use arrows or thumbnails to browse
Load image into Gallery viewer, Honda CB750F front master cylinder reservoir diaphragm 45520-371-003
Load image into Gallery viewer, SKU 08-0283 — approved OEM fiche location reference (NIGHT20261026-0093)
Load image into Gallery viewer, Master cylinder reservoir diaphragm – product view
Load image into Gallery viewer, Honda CB750F Front Master Cylinder Reservoir Diaphragm – rear view
Load image into Gallery viewer, Honda CB750F Front Master Cylinder Reservoir Diaphragm – left view
5.0 ( 1 review)

Honda CB750F Front Master Cylinder Reservoir Diaphragm ~ Replaces 45520-371-003

08-0283
$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 1,353 store reviews
Secure checkoutProtected payment
60-day returnsEligible unused parts Free ground shippingUSA & Canada over $50
Browse all parts

1 product reviews

Honda CB750F Front Master Cylinder Reservoir Diaphragm ~ Replaces 45520-371-003

Honda CB750F Front Master Cylinder Reservoir Diaphragm ~ Replaces 45520-371-003
$7.95 USD
Description

Replace the diaphragm on your 1977-78 CB750F front master cylinder reservoir with this Front Master Cylinder Reservoir Diaphragm, replacing OEM #45520-371-003 / #44520-371-013.

Key Features
• Front master cylinder reservoir diaphragm
• Replaces OEM #45520-371-003 / #44520-371-013
• Superseded by Honda 45520-371-013

Fitment / Compatibility

• FRONT master cylinder: Honda CB750F (1977‑78) Supersport

Part Number: 08-0283

Read More
Read Less

Check the listed model and year, then read any fitment notes in the description.

Make Model Year
Honda CB750F 1977
Honda CB750F 1978

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.

See full shipping details

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 return

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

Where does reservoir diaphragm 08-0283 fit on a Honda CB750F?

It fits beneath the front brake master cylinder reservoir cover on 1977-78 Honda CB750F Supersport models; it is not a rear master cylinder diaphragm.

Which Honda OEM number does CB750F diaphragm 08-0283 replace?

The front reservoir diaphragm replaces Honda OEM 45520-371-003.

Does 08-0283 include the reservoir lid or master cylinder rebuild parts?

No. SKU 08-0283 is the rubber front-reservoir diaphragm only; the lid, screws and hydraulic piston rebuild kit are separate.

See Why Customers Love Us

Your cart

×