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1973 Honda CL350K5 Tank Seals, Mounts & Petcocks

Tank service on a 1973 Honda CL350K5 can involve a cap seal, rear support rubber or fuel petcock. Start by identifying the fitted tank and cap, then match each part to its own mounting or sealing location before deciding the order.

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Currently viewing Gas Tanks, Caps, Petcocks & Parts

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Honda CB750 CB550 CB500 CB400 CB360 gas cap rubber seal 17534-323-300

Honda CB Gas Cap Rubber Seal ~ Replaces 17534-323-300

$8.19 $7.95 USD
You save $0.24
20-0039
Replace your mid-'70s Honda gas cap rubber seal with this Gas Cap Rubber Seal, replacing OEM #17534-323-300. Broad fitment across the SOHC CB750K, CB500/CB550...
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Honda CB550 CB500 CB360 rear fuel tank holder rubber 17613-286-000

Honda CB Rear Fuel Tank Holder Rubber ~ Replaces 17613-286-000

$9.95 USD
12-0133
Restore proper rear fuel tank mounting on your mid-'70s twin or four with this Rear Fuel Tank Holder Rubber, a direct replacement for OEM...
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...
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1973 Honda CL350K5 · Tank Seals & Petcocks Buying guide

Match each tank interface independently

The cap seal and rear cushion use different references, while the petcock has a specified thread. A changed tank can alter more than one of these matches, so inspect the whole fitted arrangement.

Parts to consider

Honda CB Gas Cap Rubber Seal ~ Replaces 17534-323-300 Fuel-cap rubber sealSeparate cap seal with replacement reference 17534-323-300.View part Honda CB Rear Fuel Tank Holder Rubber ~ Replaces 17613-286-000 Rear tank support rubberRear fuel-tank cushion with replacement reference 17613-286-000.View part Honda CB Fuel Petcock ~ Replaces 16950-292-000 Threaded fuel petcockM16 × 1.5 tank connection; replacement reference 16950-292-000.View part

Distinguish a cap seal from a tank support

The cap seal replaces reference 17534-323-300. The rear tank holder rubber uses 17613-286-000 and serves a different location. Compare each with the fitted part rather than assuming that similarly named fuel-tank rubbers come together or are interchangeable.

Recheck all fittings on a swapped tank

For a replacement tank, confirm the petcock thread, hose routing space, cap design and rear support arrangement individually. The petcock is offered with M16 × 1.5 threads, but the product does not identify every tank previously fitted to this motorcycle. Resolve that match before ordering.

Buying questions

How do I choose a rear cushion after a tank swap?

Compare the replacement tank’s rear support arrangement with the fitted frame and removed rubber. A matching petcock thread or cap does not settle the cushion match; send the supplier photographs of the mounting location before buying.

Can I choose the cap seal using the year stamped on the bike?

Identify the actual tank and cap first. If either has been changed, the motorcycle year alone may be misleading; compare the fitted seal with reference 17534-323-300 and confirm the cap application.

What should I measure for a replacement petcock?

Confirm the tank connection’s diameter and pitch against M16 × 1.5, then check the available space and hose arrangement. If the tank is aftermarket or unidentified, give those details to the supplier before choosing.

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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