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1980 Honda CB125S Engine Parts

An engine-parts order for a 1980 Honda CB125S starts with the job you are doing. For routine oil service, the magnetic drain plug below offers a defined thread and replacement reference. Internal repairs need their own component identification and measurements.

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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 CB100 CB125S engine oil seal kit 91201-030-0333

1970-80 Honda CB100 / CB125S Engine Oil Seal Kit

$11.21 USD
07-4648
Rebuild your CB100K or CB125S small-bore engine with this 4-piece Engine Oil Seal Kit. Covers the key oil seals for a proper refresh, saving...
New
Honda CB125 CB100 tappet adjusting hole cap 12361-383-000

Honda CB125 / CB100 Tappet Adjusting Hole Cap ~ Genuine Honda 12361-383-000 ~ Replaces 12361-383-000

$13.50 USD
99-5199
This genuine Honda tappet adjusting hole cap closes the valve adjustment access opening on the Honda models listed below. It is also commonly searched...
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 CB125S intake valve 14711-440-003

1980-82 Honda CB125S Intake Valve ~ Replaces 14711-440-003

$19.95 USD
01-9965
Restore proper engine performance with this Intake Valve, designed as a direct replacement for the original Honda component. This valve replaces OEM part numbers...
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 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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1980 Honda CB125S · Engine Buying guide

Start with the engine job and its mounting details

The featured plug has a 12 mm diameter and 1.5 mm thread pitch, with replacement reference 92800-12000. These are useful purchase checks when the engine or drain fitting has an uncertain service history.

Parts to consider

Honda CB Magnetic Oil Drain Plug Magnetic oil drain plug12 mm diameter, 1.5 mm thread pitch; replacement reference 92800-12000.View part

Order around the work actually required

Keep routine oil-service purchases separate from a top-end or case repair. The magnetic drain plug has a clear 1980 CB125S application, but choosing it does not establish which internal parts an engine needs. Identify the affected assembly before adding rebuild components.

Treat a repaired drain opening as a separate fitment question

A previous thread repair can change what fits even when the engine is correct for the motorcycle. Compare the installed plug and opening with the replacement dimensions. If their history is unclear, have the thread condition checked before selecting a standard-size plug.

Buying questions

Can I choose the plug by its 12 mm diameter alone?

Check the pitch as well. This plug uses a 1.5 mm pitch, so the useful comparison is M12 × 1.5. The diameter alone does not identify the complete thread.

What does the magnetic feature do?

The plug is designed to capture steel debris. It provides a feature to inspect during oil service; use the appropriate service information to assess the engine rather than treating the magnet as a diagnosis.

What if the motorcycle has a replacement engine?

Choose parts for the engine that is fitted. Record its identification and compare the drain connection before ordering. A 1980 frame or registration does not identify a replacement engine’s internal components or previous repairs.

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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