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1970 Honda CL450K3 Drain Plug & Rotor Washer

For oil-service work on a 1970 Honda CL450K3, distinguish the sump drain plug from the oil-filter rotor washer. The custom plug has a specified thread and clearance requirement; the angled washer serves a different location and needs its own comparison with the removed part.

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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 CL450K3 · Drain Plug & Rotor Washer Buying guide

Match each oil-service part to its location

This selection covers a magnetic drain plug and a special angled rotor washer. Check each against the assembly being serviced, especially where an engine replacement or other modification has changed the original fittings.

Parts to consider

Honda CB Joker Machine Magnetic Oil Drain Plug ~ Replaces 90013-312-000 Joker Machine magnetic drain plugIncludes an O-ring. The replacement has an M33.7 × 1.5 mm thread and uses a 19 mm socket.View part Honda CB Special Oil Filter Rotor Washer ~ Replaces 90481-292-000 Angled oil filter rotor washerSpecial angled washer, described as 16 mm, with replacement reference 90481-292-000.View part

Measure the custom drain plug

The Joker Machine plug includes an O-ring and takes a 19 mm socket. Its stated dimensions are replacement-product measurements, so check thread and nearby clearance on the actual engine. Do not treat the product’s dimensions as proof of the bike’s original drain fitting.

Keep the washer at its specified assembly

The 16 mm special angled washer is referenced to 90481-292-000 and described for the oil-filter rotor. Compare the removed washer and use the correct service information for orientation and tightening. A drain-plug order and a rotor-service order require separate checks.

Buying questions

Is a sealing O-ring supplied with the drain plug?

Yes. The magnetic drain plug is supplied with an O-ring. Check the replacement’s M33.7 × 1.5 mm thread and available clearance before ordering it for the engine currently fitted.

Can I select this plug by socket size alone?

No. The 19 mm socket fitting only describes how the plug is driven. Thread, 45 mm outside diameter and 19 mm projection from the case are separate checks on the replacement part.

Is the rotor washer a flat general-purpose washer?

It is described as a special angled 16 mm oil-filter rotor washer. Match the reference and shape to the removed item and follow the appropriate service information for that assembly; do not substitute by diameter alone.

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