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1978 Honda CB125S5 Engine Parts

Start a 1978 Honda CB125S5 engine-service order with the part you can identify precisely. The magnetic drain plug offers a documented replacement reference and thread specification, giving you concrete details to compare with the engine fitted to your motorcycle.

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Most orders ship same or next business day Fitment guarantee Listed for your exact model and year? We’ll make it right if it doesn’t fit as described. Mechanic-backed support Ask our team for help choosing the right Honda CB part.
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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 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 CB125S pulse generator cover gasket 30372-437-010

1976-82 Honda CB125S Pulse Generator Cover Gasket ~ Replaces 30372-437-010

$8.27 USD
73-1198
Restore factory sealing and protect your engine with this Pulse Generator Cover Gasket, designed to replace worn or damaged gaskets. Made to meet OEM...
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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1978 Honda CB125S5 · Engine Buying guide

Match the drain plug to the engine you have

The featured magnetic plug replaces reference 92800-12000. Its 12 mm diameter and 1.5 mm thread pitch are useful ordering checks, especially when the motorcycle has acquired a different engine or drain fitting.

Parts to consider

Honda CB Magnetic Oil Drain Plug Magnetic oil drain plug12 mm diameter with a 1.5 mm thread pitch. Replaces reference 92800-12000 and captures steel debris.View part

Use a precise replacement reference

Keep the removed plug or its part record available when ordering. The magnetic replacement is specified as 12 mm diameter with a 1.5 mm pitch and references 92800-12000. Those details help distinguish the required fitting from another plug that looks similar.

Plan the sealing parts

The featured item is a magnetic drain plug. A sealing washer is not identified among its supplied contents, so confirm that detail before finalizing an oil-service order. Use the service manual for the sealing arrangement and tightening specification. Do not substitute a guessed torque value.

Common ordering questions

Is a 12 mm diameter enough to choose the plug?

Check the pitch as well. This replacement specifies a 12 mm diameter and 1.5 mm pitch. An engine swap or repaired drain opening needs its own thread check rather than a year-only match.

Should I add a sealing washer to the order?

Confirm the supplied contents first; a washer is not specified for this plug. If you need one, match it to the installed drain fitting and the service manual rather than choosing by appearance.

Does the Honda reference mean this is a genuine Honda part?

The plug is described as a replacement for 92800-12000, without a genuine-Honda claim. Use that number to compare the application; confirm the manufacturer separately if genuine Honda supply is important to your restoration.

Not sure which part you need?

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