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1974 Honda CB450K Filler-Cap Repair Scope & Individual Tank Hardware

Identify the cap mechanism, sealing rubber and mounting hardware staying on your 1974 CB450K’s tank. Complete cap descriptions cover different named pieces, while separate latch and seal purchases serve narrower repairs. Compare the retained attachments before adding individually sold cushions or emblem fasteners.

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Currently viewing Gas Tanks, Caps, Petcocks & Parts

Honda motorcycle parts

Choose your model and year to see parts listed for your bike.

Honda CB front fuel tank holder rubber 17611-283-010

Honda CB Front Fuel Tank Holder Rubber ~ Replaces 17611-283-010

$7.87 USD
02-6534
Secure the front of your fuel tank with this Front Fuel Tank Holder Rubber, a direct replacement for OEM #17611-283-010. Fits a broad range...
Honda CB750 CB550 CB500 CB450 type filler chrome cap 17510-323-310

Honda CB OEM Type Filler Chrome Cap ~ Replaces 17510-323-310

$49.95 USD
20-0045
Replace your OEM-type filler cap with this OEM Type Gas/Fuel Tank Chrome Cap, including gasket and hinge pin with E-clip for easy installation. Replaces...
Honda CB750 CB550 CB500 CB450 CB400 gas fuel tank cap latch assembly

Honda CB Gas/Fuel Tank Cap Latch Assembly

$44.95 USD
20-0083
Replace your gas cap latch with this Gas/Fuel Tank Cap Latch Assembly. Includes a chrome latch, return spring, latch mounting pin, and C-clip.Key Features•...
Honda CB750 CB450 CB350 CL350K3 gas cap rubber seal 17525-300-000

Honda CB Gas Cap Rubber Seal ~ Replaces 17525-300-000

$5.95 USD
20-0038
Replace your early Honda gas cap rubber seal with this Gas Cap Rubber Seal, replacing OEM #17525-300-000. Fits the earliest CB750K, CB450K/CL450K, and CB350K/CL350K/SL350K.Key...
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Honda CB1000 CB900 CB750 fuel tank emblem clamp nut 87311-634-600

Honda CB Fuel Tank Emblem Clamp Nut ~ Replaces 87311-634-600

$6.25 USD
99-5267
Secure your fuel tank emblem properly with this Fuel Tank Emblem Clamp Nut, designed as a direct replacement for the original Honda hardware. This...
Honda CB450 CB360 CB350 CL350K0 CL350K2 fuel petcock 16950-292-000

Honda CB Fuel Petcock ~ Replaces 16950-292-000

$34.95 USD
29-0542
Replace your CB450, CL450, CB350, or CB360 fuel petcock with this Fuel Petcock, replacing OEM #16950-292-000 with M16 x 1.5 threads. Please verify the...
Honda CB750 CB550 CB450 CB400F fuel tank cap latch 17510-323-310

Honda CB Matte Black Fuel Tank Cap with Latch ~ Replaces 17510-323-310

$69.95 USD
07-9967
Restore your classic Honda's tank with a factory-look matte-black finish using this Matte Black OEM-Type Fuel Tank Cap with Latch Assembly. A direct replacement...
Honda CB750 CB550 CB400F CB450 CB360 tank cap latch assembly black

Honda CB Gas/Fuel Tank Cap Latch Assembly ~ Black

$29.95 USD
01-9934
Replace a broken, missing, or worn-out fuel cap latch with this Gas/Fuel Tank Cap Latch Assembly in black. Includes the black latch, return spring,...
Honda CB750 CB550 joker machine black gas tank cap latch assembly

Honda CB Joker Machine Black Gas Tank Cap Latch Assembly

$79.95 USD
73-1157
Upgrade your fuel tank latch with the Joker Machine Custom Black Gas/Fuel Tank Cap Latch Assembly. Designed as a premium alternative to the discontinued...
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1974 Honda CB450K · Gas Tanks, Caps, Petcocks & Parts Buying guide

Read the cap’s sealing and fastening contents together

The chrome cap includes gasket and hinge hardware. The matte-black cap additionally names its latch mechanism. A separate latch or rubber seal can be compared with a cap retained in service, while front cushions and emblem nuts have separate locations and purchase counts.

Parts to consider

Honda CB Matte Black Fuel Tank Cap with Latch ~ Replaces 17510-323-310 Matte-black cap including its latch mechanismCap references Honda 17510-323-310 and lists gasket, hinge pin with E-clip, latch, return spring, latch mounting pin and C-clip. Match the tank attachment before choosing it. Check these named pieces before adding separate hinge, sealing or latch purchases.View part Honda CB Gas Cap Rubber Seal ~ Replaces 17525-300-000 Cap rubber under its own sealing referenceSeal replaces Honda 17525-300-000 for the listed CB450K application. Compare the removed rubber and the cap being retained. The description provides no full dimensions for identifying the sealing arrangement of an unknown aftermarket cap.View part Honda CB Gas/Fuel Tank Cap Latch Assembly Separate latch with spring and pin hardwareChrome latch package includes return spring, mounting pin and C-clip. Compare the cap’s retained latch attachment before choosing it. These contents renew the mechanism without itemizing a cap body, hinge assembly or sealing gasket.View part

Related parts: Chrome cap with gasket and hinge components · Single front tank cushion purchase · Individual emblem clamp-nut purchase

Compare latch attachment details before choosing a black finish

The standard black latch names a spring, mounting pin and C-clip, as does the chrome mechanism. The Joker Machine latch lists an alloy screw and nut with its spring and latch. Match the cap attachment and named fastening pieces; finish alone does not identify the required mechanism.

Check the tank valve and supports outside the cap package

The petcock lists M16 × 1.5 threads with a verification requirement. Front support cushions use 17611-283-010, sell individually and have a stated two-per-bike application. Neither the valve thread nor that support count determines the cap hinge, latch or emblem fastening needed by a replaced tank.

Cap mechanism and retained-tank questions

What should I compare before replacing the seal on a cap fitted during restoration?

Match the retained cap’s sealing shape and removed rubber against reference 17525-300-000. No complete seal dimensions are supplied. Confirm the missing measurements needed by that cap before choosing the rubber from the motorcycle application alone.

How do I avoid adding latch parts already named with a complete cap?

Read the selected cap’s contents against the mechanism being renewed. The matte-black package lists latch, return spring, latch pin and C-clip as well as gasket and hinge hardware. The chrome description does not itemize that latch mechanism, so confirm its required coverage separately.

What needs checking if an aftermarket tank uses familiar-looking front supports?

Compare the actual mounting and cushion reference 17611-283-010 before ordering. The application states two cushions used per bike but sells each. Establish the replacement tank’s attachment and number of positions being renewed; its outlet thread and emblem hardware require their own checks.

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