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1984 Honda CB125S Engine Parts

Plan engine parts for your 1984 Honda CB125S around the assembly being serviced. For a drain-fitting repair, the magnetic plug below provides a specific replacement reference and thread size. Compare the removed fitting before deciding what belongs on your order.

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Honda motorcycle parts

Choose your model and year to see parts listed for your bike.

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Honda CB900 CB750 CB700 CB650 drain plug washer

Honda CB900/CB750/CB700/CB650 Drain Plug Washer

$1.75 USD
15-0006
Fit the smaller 12mm drain plug washer with this 12mm x 18mm x 1mm Drain Plug Crush Washer. Broad fitment across the SOHC CB750,...
Honda CB900 CB750 CB700 CB650 CB550 magnetic oil drain plug

Honda CB Magnetic Oil Drain Plug

$12.95 USD
15-0016
Fit a 12mm magnetic drain plug with this Magnetic Oil Drain Plug, 12mm diameter x M1.5, replacing OEM #92800-12000. Broad fitment across the SOHC...
Honda CB Piston Pin Clips 15mm Pk/2 ~ Replaces 94601-15000

Honda CB Piston Pin Clips 15mm Pk/2 ~ Replaces 94601-15000

$1.95 USD
05-7201
Secure your piston pins with this 2-pack of 15mm Piston Pin Clips, Japanese made to superior quality and replacing OEM Ref. #94601-15000. Exceptionally broad...
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Honda CB750 CB700 performance magnetic oil drain plug joker machine

Honda CB Performance Magnetic Oil Drain Plug ~ Joker Machine

$49.95 USD
73-1074
Catch metal debris from your engine with this Joker Machine Brand Custom Performance Magnetic Oil Drain Plug, 12mm dia x M1.5, OEM #92800-12000.The plug...
Honda CB125 CB100 oil pump gasket 15126-107-020

Honda CB125 / CB100 Oil Pump Gasket ~ Replaces 15126-107-020

$2.95 USD
73-1196
Ensure a secure, leak-free seal during your engine rebuild or maintenance with this Oil Pump Gasket. Precisely engineered to replace OEM# 15126-107-020, this gasket...
New
Honda CB650 CB550 CB500 piston pin 13111-440-000

Honda CB Genuine Honda Piston Pin ~ OEM 13111-440-000 / 13111-286-000

$18.95 USD
99-5321
Upgrade or restore your classic Honda motorcycle with this Genuine Honda Piston Pin — precision‑engineered and made in Japan. This authentic replacement fits and...
New
Honda CB125S exhaust valve 14721-437-000

1980-85 Honda CB125S Exhaust Valve ~ Replaces 14721-437-000

$19.95 USD
01-9966
Restore proper engine performance with this Exhaust Valve, designed as a direct replacement for the original Honda component. This valve replaces OEM part number...
New
Honda CB125 CB100 Honda oil filter screen spring 15426-107-000

Honda CB125 / CB100 Genuine Honda Oil Filter Screen Spring ~ OEM 15426-107-000

$25.00 USD
99-5044
Upgrade or restore your classic Honda motorcycle with this Genuine Honda Oil Filter Screen Spring — precision‑engineered and quality made in Japan. This authentic...
New
Honda CB100 CB125 oil filter screen 15421-107-000

Honda CB100 / CB125 Oil Filter Screen ~ Replaces 15421-107-000

$5.64 USD
01-8998
Protect your small-displacement Honda's engine with this Oil Filter Screen, a direct replacement for OEM #15421-107-000. Fits the CB100K and CB125S series, filtering debris...
Honda CB125 CB100 oil filter cap gasket 15459-KT0-710

Honda CB125 / CB100 Oil Filter Cap Gasket ~ Replaces 15459-KT0-710

$5.95 USD
73-1197
Maintain proper oil system sealing with this high-quality Oil Filter Cap Gasket. This direct replacement meets OEM specifications to ensure a leak-free seal when...
Honda CB125 cylinder head gasket 12251-437-P00

1973-85 Honda CB125 Cylinder Head Gasket ~ Replaces 12251-437-P00

$14.95 USD
73-1192
Restore compression and prevent leaks with this high‑quality Cylinder Head Gasket. This gasket is engineered to meet OEM specifications for a precise fit and...
Honda CB125S CB100K front sprocket 14 tooth 23801-KF9-900

1970-85 Honda CB125S / CB100K Front Sprocket ~ 14 Tooth ~ Replaces 23801-KF9-900

$17.41 USD
23-0413
14 tooth front sprocket designed as a replacement for a range of OEM applications, matching references 23801-KF9-900, 23801-107-760, 23801-437-000, 27511-27100, 5H0-17461-40, 5N0-17461-40, and 93822-14043-00....
Honda CB125S cam chain 25H x 98 14401-383-003

1976-85 Honda CB125S Cam Chain ~ 25H x 98 ~ Replaces 14401-383-003

$31.72 USD
52-3013
Replace your CB125S cam chain with this Cam Chain 25H x 98, replacing OEM #14401-383-003 / #14401-428-003 / #14401-439-003. D.I.D (Daido) brand. Pitch .25,...
Honda CB400 CB450 CB125 valve stem seal 12208-413-003

Honda CB400 / CB450 / CB125 Valve Stem Seal

$3.10 USD
01-0128
Stop top-end oil loss with this Valve Stem Seal, a replacement for OEM #12208-413-003 / #12209-KL4-005 / #12209-428-003. Fits a range of smaller-displacement Hondas,...
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1984 Honda CB125S · Engine Parts Buying guide

Choose engine parts by the job in hand

The magnetic drain plug has a 12 mm diameter and 1.5 mm thread pitch. Its reference helps identify the replacement; the sealing seat and condition of the engine opening still deserve a separate check.

Parts to consider

Honda CB Magnetic Oil Drain Plug Magnetic oil drain plugA magnetic drain plug specified as 12 mm × 1.5, with replacement reference 92800-12000. Match the removed plug and its sealing arrangement before ordering.View part

Start with the engine actually fitted

An engine swap can leave the frame year correct but the service-part choice wrong. Record the engine identity and compare the removed plug with reference 92800-12000. If the drain opening has been repaired, establish the repair specification before ordering from the motorcycle application.

Separate thread fit from the sealing joint

The replacement plug is specified as 12 mm × 1.5. Compare both figures with the existing fitting, then check how the plug seats and seals. Do not choose by outside diameter alone or treat a replacement plug as a repair for damaged engine threads.

Common buying questions

What if the motorcycle has had an engine replacement?

Identify the engine now installed and its drain fitting before using the frame year to choose parts. Use that engine’s parts information to identify the drain fitting, then compare the removed plug with reference 92800-12000 and the offered M12 × 1.5 specification.

Does a magnetic plug replace normal oil-system servicing?

No. It is an oil-drain fitting with a magnet for collecting steel debris. Continue the oil-system inspections and service specified for the engine; do not use the presence of a magnet to extend service intervals.

Can this plug be selected for a repaired drain hole?

Only after the repaired opening’s thread and seating requirements are known. A repair insert or altered thread may change the fitting needed, even when the original motorcycle application is correct.

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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