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  • 1979-83 Honda CB900 / CB750 Carb Pump Diaphragm ~ Replaces 16021-679-005
Honda CB900 CB750 carb pump diaphragm 16021-679-005
Carb pump diaphragm, SKU 20-9042: product photo and reviewed parts fiche. Example diagram; check listing for fitment.
Honda CB750 CB900 Carb Pump Diaphragm - Replaces Honda OEM 16021-679-005 — 01-product (20-9042)
Honda CB750 CB900 Carb Pump Diaphragm - Replaces Honda OEM 16021-679-005 — 05-left (20-9042)
Honda CB750 CB900 Carb Pump Diaphragm - Replaces Honda OEM 16021-679-005 — 06-right (20-9042)
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Honda CB900 CB750 carb pump diaphragm 16021-679-005

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Load image into Gallery viewer, Honda CB900 CB750 carb pump diaphragm 16021-679-005
Load image into Gallery viewer, Carb pump diaphragm, SKU 20-9042: product photo and reviewed parts fiche. Example diagram; check listing for fitment.
Load image into Gallery viewer, Honda CB750 CB900 Carb Pump Diaphragm - Replaces Honda OEM 16021-679-005 — 01-product (20-9042)
Load image into Gallery viewer, Honda CB750 CB900 Carb Pump Diaphragm - Replaces Honda OEM 16021-679-005 — 05-left (20-9042)
Load image into Gallery viewer, Honda CB750 CB900 Carb Pump Diaphragm - Replaces Honda OEM 16021-679-005 — 06-right (20-9042)
5.0 ( 1 review)

1979-83 Honda CB900 / CB750 Carb Pump Diaphragm ~ Replaces 16021-679-005

20-9042
$27.95 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
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1 product reviews

1979-83 Honda CB900 / CB750 Carb Pump Diaphragm ~ Replaces 16021-679-005

1979-83 Honda CB900 / CB750 Carb Pump Diaphragm ~ Replaces 16021-679-005
$27.95 USD
Description

Rebuild your DOHC CB750's Keihin carb accelerator pump with this Carb Pump Diaphragm, replacing OEM #16021-679-005. Kit contains 1 diaphragm with rod and 1 bellow rubber.

Key Features
• Carb pump diaphragm for Keihin carbs
• Replaces OEM #16021-679-005
• Includes diaphragm with rod + bellow rubber
• Honda part name: Diaphragm Set, Pump

Fitment / Compatibility

• Honda CB750K (1979‑82)
• CB750F (1979‑82) Supersport
• CB750L (1979) Limited Edition
• CB750C (1980‑82) Custom

• Honda CB750SC (1982‑83) Nighthawk

• Honda CB900C (1980‑82) Custom

Part Number: 20-9042

Read More
Read Less

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

Make Model Year
Honda CB750K Standard 1979
Honda CB750F Supersport 1979
Honda CB750L Limited 1979
Honda CB750K 1980
Honda CB750F 1980
Honda CB750C Custom 1980
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 CB900C Custom 1980
Honda CB900C 1981
Honda CB900C 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

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 is included with accelerator-pump kit 20-9042?

One diaphragm with rod and one bellows rubber are included for servicing the compatible Keihin accelerator-pump assembly.

Which Honda pump-diaphragm number does 20-9042 replace?

The accelerator-pump diaphragm cross-references Honda OEM 16021-679-005 for the listed 1979-1983 CB750, CB900C and CB900F carburetors.

What can a damaged accelerator-pump diaphragm cause?

A split, hardened or leaking diaphragm can prevent the pump from delivering its enrichment shot when the throttle opens, causing hesitation during acceleration.

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