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1971 Honda CB450K Drain-Plug Fit & Rotor-Washer Identity

Match the oil-service component before ordering for a 1971 Honda CB450K. A magnetic drain plug with O-ring and a special rotor washer have different positions and checks. Use the plug’s listed thread and clearance, or the washer’s angled profile and Honda reference.

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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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1971 Honda CB450K · Oil Filters, Drain Plugs, Oil Pump & Gauges Buying guide

Choose the drain component or rotor component explicitly

The plug lists M33.7 × 1.5mm thread, a 19mm socket and body-clearance details. The washer lists an angled form, 16mm and Honda 90481-292-000. These details do not establish a combined oil-system service package.

Parts to consider

Honda CB Special Oil Filter Rotor Washer ~ Replaces 90481-292-000 Angled 16mm oil-filter rotor washerSpecial rotor washer referenced to Honda 90481-292-000. Match the angled profile; the description does not define every dimension, orientation or supplied quantity.View part Honda CB Joker Machine Magnetic Oil Drain Plug ~ Replaces 90013-312-000 Joker Machine magnetic drain plugPlug with O-ring, M33.7 × 1.5mm thread, 19mm socket and 45mm outside diameter. Stated clearance off the case is 19mm; verify the fitted space.View part

Treat thread and space as different checks

The listed drain-plug thread identifies the connection, while its 45mm outside diameter and stated 19mm case clearance concern the fitted space. Check both against the motorcycle, particularly after nearby component changes. The 19mm socket figure is a tool-access specification and does not provide a torque setting.

Keep the rotor washer’s profile in the comparison

The washer is described as specially angled, so a nominal 16mm figure is not sufficient to establish a generic replacement. Compare the original profile with Honda 90481-292-000 and confirm any needed dimension. Consult the fitted engine’s service information for its installed arrangement rather than inferring orientation from the photograph.

Buying questions

What information helps decide whether the magnetic plug suits the fitted drain?

Compare Honda 90013-312-000 and the M33.7 × 1.5mm thread, then check the stated body diameter and clearance off the case. Its included O-ring is a supplied sealing item, not confirmation that every modified drain arrangement matches.

Does the magnet’s description cover every kind of engine contamination?

It describes capture of steel debris in the sump. The listing does not establish capture of all contaminants or diagnose the engine’s condition. Use the plug’s component, thread and clearance details for the purchase rather than treating it as a substitute for the oil-service requirements.

What should I confirm when only the rotor washer needs replacement?

Match its angled profile and Honda 90481-292-000 with the removed part. The stated 16mm is not a complete dimension drawing, and supplied quantity is unclear. Confirm those details as needed; the separate drain plug is not described as part of the washer purchase.

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