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1973 Honda CB125S0 Engine Service Parts

Start an engine service order for your 1973 Honda CB125S0 with the component actually needing replacement. The featured magnetic oil drain plug replaces Honda reference 92800-12000. Check the existing plug, drain opening and any earlier thread repair before choosing it.

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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...
Honda CB550 CB500 CB125 CB100 intake valve 14711-107-020

Honda CB550 / CB500 / CB125 / CB100 Intake Valve ~ Replaces 14711-107-020

$17.95 USD
73-0981
Replace your intake valve with this Intake Valve, replacing OEM #14711-107-020. Made in Japan.Key Features• Intake valve• Replaces OEM #14711-107-020• Made in Japan• Honda...
Honda CB750 CB650 cylinder sleeve o-ring gasket set 91304-286-000

Honda CB Cylinder Sleeve O-Ring Gasket Set ~ Replaces 91304-286-000

$4.50 USD
18-7068
Replace your cylinder sleeve O-rings with this Cylinder Sleeve O-Ring Set of 4, replacing OEM #91304-286-000.Key Features• Cylinder sleeve O-rings, 4 per set• Replaces...
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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 CB125S overhaul gasket set

1973-75 Honda CB125S Overhaul Gasket Set

$32.95 USD
18-0097
Perform a complete engine overhaul on your CB125S with this Engine Overhaul Gasket Set.Key Features• Engine overhaul gasket setFitment / Compatibility• Honda CB125S (1973‑75)Part...
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 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 cam chain 25H x 100 14401-107-000

1970-75 Honda CB125S / CB100K Cam Chain ~ 25H x 100 ~ Replaces 14401-107-000

$31.72 USD
52-3014
Replace your CB100K or early CB125S cam chain with this Cam Chain 25H x 100, replacing OEM #14401-107-000 / #14401-958-003 / #14401-427-003. D.I.D (Daido)...
New
Honda CB125S top end engine gasket set

1973-75 Honda CB125S Top End Engine Gasket Set

$23.95 USD
18-0085
Rebuild the top end of your CB125S with this Top End Engine Gasket Set. Includes the contents shown in the product photo.Key Features• Top...
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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1973 Honda CB125S0 · Engine Service Parts Buying guide

Match the replacement to the engine fitted

An older engine may carry replacement parts or repaired threads. For the featured drain plug, compare the reference and specified thread with the current drain opening before adding it to the service order.

Parts to consider

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

Check the drain opening as well as the plug

The magnetic plug replaces reference 92800-12000 and has a 12 mm diameter with 1.5 mm thread pitch. Compare the fitted drain opening before ordering, particularly if its threads have been repaired. A model match does not establish the size of a modified opening.

Base the order on the actual repair

Identify the source of an oil leak and inspect the plug and sealing area before selecting parts. A replacement drain plug addresses that component; it does not establish the condition of the receiving thread. Use the correct Honda service information when planning the inspection and repair.

Buying questions

Will the drain plug suit an engine with repaired drain threads?

Confirm the repaired opening still accepts the specified 12 mm diameter and 1.5 mm pitch before ordering. An oversize repair or different thread arrangement needs its own matching plug.

What does the magnetic feature add to this replacement plug?

The plug incorporates a magnet for collecting steel debris. Choose it only after confirming the thread and replacement reference match the engine; the magnetic feature alone does not establish compatibility.

Can I order by motorcycle year if the engine has been replaced?

Check the engine actually fitted and compare the existing drain plug and opening with reference 92800-12000 and the specified thread. A replacement engine needs its own application check rather than relying only on the frame’s model year.

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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