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1985 Honda CB125S Engine Parts

An engine-parts order for the 1985 Honda CB125S starts with a specific repair, rather than a general rebuild list. The magnetic drain plug below suits a drain-hardware comparison. Seals, valve parts and internal components require their own references and service assessment.

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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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1985 Honda CB125S · Engine Buying guide

Divide the engine job into specific purchases

Use the drain plug’s thread specification and replacement reference to identify the connection. Keep that external service purchase separate from internal engine parts, especially when an earlier owner has changed the engine or repaired the drain.

Parts to consider

Honda CB Magnetic Oil Drain Plug Magnetic drain plugA magnetic drain plug with a 12 mm diameter and M1.5 thread, listed against replacement reference 92800-12000.View part

Match the drain connection

The magnetic plug is described with a 12 mm diameter and M1.5 thread. Those are product measurements, so compare them with your existing connection. A changed engine or repaired drain thread calls for a fresh check rather than relying on the motorcycle year alone.

Separate identification from the repair procedure

Reference 92800-12000 identifies the drain plug replacement offered here. It does not specify the torque, seal condition or internal parts needed for an engine overhaul. Use service information for the actual engine to plan the work, then select each required component by its own reference.

Questions before ordering

Can I choose the plug just by its thread diameter?

Compare the thread pitch as well as the 12 mm diameter, and check the sealing arrangement against the existing part. If the drain connection has been repaired or changed, establish its specification before choosing a replacement.

What if the replacement engine differs from the frame model?

Use the installed engine’s identity and existing drain connection when choosing the plug. The 1985 frame designation alone cannot establish the hardware on a swapped engine; compare both the thread specification and sealing arrangement before ordering.

Which service specification should I use for installation?

Use the appropriate Honda service information for the engine installed in the motorcycle. Product dimensions and replacement references help identify a purchase; they do not establish a tightening torque or an assembly procedure.

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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