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1971 Honda SL350K1 Drain Plug & Rotor Washer

Oil-service hardware for the 1971 Honda SL350K1 includes a magnetic drain plug and a separate angled rotor washer. Identify the part being serviced first, then compare the plug’s physical dimensions or the washer’s location with the engine fitted.

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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 SL350K1 · Drain Plug & Rotor Washer Buying guide

Separate drain-plug clearance from rotor hardware

These parts serve different locations. The magnetic plug adds a steel-debris collection point; the angled washer belongs to the oil-filter rotor assembly. Choose each by its own specification and service requirement.

Parts to consider

Honda CB Joker Machine Magnetic Oil Drain Plug ~ Replaces 90013-312-000 Joker Machine magnetic drain plugBillet-aluminum plug with an O-ring and a magnet for collecting steel debris.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 around the magnetic plug

The Joker Machine plug is described with an M33.7 × 1.5 mm thread, 45 mm outside diameter and 19 mm projection from the case. Treat those as product dimensions to check against the engine and any guard, rather than assumed original motorcycle specifications.

Keep the rotor washer identified

The rotor item is a special angled 16 mm washer, reference 90481-292-000. Record its location during disassembly and consult the correct service information for orientation and assembly. A familiar diameter alone does not establish that an ordinary flat washer is suitable.

Buying questions

Does the magnetic plug come with its sealing O-ring?

Yes, the plug description includes an O-ring. Compare the replacement’s thread, diameter and case projection with the existing installation before selecting it for an engine with unknown modifications.

Will the magnet collect every kind of debris in the oil?

The stated function is to capture steel debris. Continue the engine’s prescribed oil-service and inspection routine; a magnetic drain plug should not be treated as a complete debris-removal system.

Can I replace the angled rotor washer with a flat washer of the same size?

The offered part is specifically an angled rotor washer. Identify the required shape and orientation from the correct service information before substituting hardware based only on the nominal diameter.

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