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1984 Honda CB650SC Nighthawk Tank Valves & Mounting Cushions

On the 1984 CB650SC, a leaking petcock and a tired tank mount need different service parts. Compare the valve body’s condition before choosing its diaphragm kit or a complete replacement. Front tank cushions are a separate sold-each purchase, so inspect the mounting points as well.

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Honda CB650SC CB550SC fuel petcock 16950-MA6-035

1983-85 Honda CB650SC / CB550SC Fuel Petcock ~ Replaces 16950-MA6-035

$54.95 USD
33-0010
Keep fuel flowing reliably to your carburetors with this Fuel Petcock, designed as a direct replacement for several original Honda fuel valve assemblies. This...
Honda CB front fuel tank rubber cushion 17611-KE8-000

Front Fuel Tank Rubber Cushion ~ Replaces Honda OEM 17611-KE8-000

$5.50 USD
27-5520
This aftermarket front fuel tank rubber cushion replaces Honda OEM 17611-KE8-000 on the listed Honda CB-series applications. It mounts to the frame and supports...
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Honda CB700 CB650 CB550 CB450 fuel petcock repair kit

Honda CB700 / CB650 / CB550 / CB450 Fuel Petcock Repair Kit

$27.95 USD
20-0020
Rebuild your Nighthawk fuel petcock with this Fuel Petcock Repair Kit. Includes a diaphragm, spring, and 2 O-rings.Key Features• Fuel petcock repair kit• Includes...
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1984 Honda CB650SC Nighthawk · Tank Valves & Mounting Cushions Buying guide

Check what the valve repair will actually cover

A repair kit is useful only when it matches the valve being serviced and the parts needing attention. A complete petcock is a separate application check, while the tank cushions should be chosen from the condition and shape of the fitted mounts.

Parts to consider

Honda CB700 / CB650 / CB550 / CB450 Fuel Petcock Repair Kit Petcock repair kitPetcock service kit 20-0020 for the listed Nighthawk fuel-valve application.View part 1983-85 Honda CB650SC / CB550SC Fuel Petcock ~ Replaces 16950-MA6-035 Replacement fuel petcockFuel valve listed for the 1983–85 CB650SC, including reference 16950-ME5-005.View part Front Fuel Tank Rubber Cushion ~ Replaces Honda OEM 17611-KE8-000 Aftermarket front tank cushionFront tank mounting rubber replacing Honda 17611-KE8-000; sold individually.View part

Compare the kit contents with the diagnosed fault

The repair package lists a diaphragm, spring and two O-rings. Compare those pieces with the parts needed for the repair before choosing the kit. If additional components are needed, confirm them separately rather than assuming they are supplied.

Check the replacement valve by reference and connection

The replacement petcock lists Honda references 16950-MA6-035, 16950-MA6-025, 16950-ME5-005 and 16950-ME5-015. One valve is supplied; the diaphragm kit is a separate product with its own stated application.

Tank Valves & Mounting Cushions questions

Can I order the repair kit with the new petcock for future servicing?

Confirm that combination first. The kit and complete valve both list the 1984 CB650SC, but the records do not verify that kit 20-0020 rebuilds the listed replacement valve. Shared motorcycle coverage is not confirmation that their internal parts match.

Is the tank thread specified for the replacement valve?

No thread size or connection dimensions are given in the listing. Compare the fitted tank mounting or thread arrangement, outlet direction and hose size, and obtain the missing connection details before buying for a custom or unidentified tank.

When is a diaphragm-and-seal kit insufficient for the petcock repair?

Inspect the valve body and sealing faces for corrosion, pitting or cracks and clean its passages. The diaphragm, spring and two O-rings cannot repair a damaged body; choose the repair only after identifying the valve and assessing those surfaces.

Not sure which part you need?

Send your model and year, plus photos of your existing part and any changes to the original setup.

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