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1970 Honda CB450K Magnetic Drain Plug & Rotor Washer

The oil-service choices for a 1970 Honda CB450K address two different locations: a magnetic drain plug and a special angled oil-filter rotor washer. Match the required component first, then check the plug’s dimensions or the washer’s reference and profile.

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Currently viewing Oil Filters, Drain Plugs, Oil Pump & Gauges

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Honda CB500 CB450 joker machine magnetic oil drain plug 90013-312-000

Honda CB Joker Machine Magnetic Oil Drain Plug ~ Replaces 90013-312-000

$64.95 USD
12-0108
Catch engine debris between oil changes with this Joker Machine Magnetic Oil Drain Plug with O-ring, replacing OEM #90013-312-000. High-quality 6061 billet aluminum body...
Honda CB500 CB450 CB360 special oil filter rotor washer 90481-292-000

Honda CB Special Oil Filter Rotor Washer ~ Replaces 90481-292-000

$9.46 USD
29-7034
Replace your oil filter rotor washer with this Special Angled Oil Filter Rotor Washer (16mm), replacing OEM #90481-292-000.Key Features• Special angled oil filter rotor...
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1970 Honda CB450K · Oil Filters, Drain Plugs, Oil Pump & Gauges Buying guide

Keep drain-plug checks separate from rotor hardware

The Joker Machine plug includes an O-ring and states its thread, body diameter and clearance off the case. The rotor washer lists Honda 90481-292-000 and a 16mm size. Neither description establishes a complete oil-system service kit.

Parts to consider

Honda CB Joker Machine Magnetic Oil Drain Plug ~ Replaces 90013-312-000 Joker Machine magnetic drain plugPlug with O-ring, Honda reference 90013-312-000 and M33.7 × 1.5mm thread. Lists a 19mm socket, 45mm body diameter and stated 19mm case clearance.View part Honda CB Special Oil Filter Rotor Washer ~ Replaces 90481-292-000 Special angled oil-filter rotor washerAngled 16mm rotor washer listing Honda 90481-292-000. Compare the required profile; complete dimensions, orientation and package quantity are not stated.View part

Check physical space as well as the thread

The drain plug’s thread specification is only one fit check. Compare its 45mm outside diameter and stated 19mm clearance off the case with the fitted case and nearby equipment, including changes made by previous owners. Its 19mm socket specification describes tool access, not an installation torque.

Choose the washer by component identity

The rotor washer is expressly angled. A generic flat washer with a similar nominal size is not established as equivalent. Keep Honda 90481-292-000 and the original profile together when comparing parts, and obtain the fitted engine’s service information for the correct installed arrangement.

Buying questions

What does the magnetic drain plug capture?

The listing describes its magnet as capturing steel debris in the sump. It does not claim capture of every type of contamination or diagnose engine condition. Choose the plug by the required reference, thread and clearance rather than treating the magnet as a complete oil-service solution.

What sealing part is included with the drain plug?

An O-ring is explicitly included. Compare the fitted drain arrangement and the stated thread and dimensions before ordering. The rotor washer is a separate component in a different location; its inclusion with the plug is not described.

Can I select the rotor washer from the 16mm figure alone?

That figure is not a complete dimension drawing. Compare the angled shape and Honda 90481-292-000, then confirm any measurement needed for your fitted hardware. The description also leaves package quantity and installation orientation unspecified.

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