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1971 Honda CB100K1 Engine Parts

An engine-parts order is easier to check when each item has a defined job. For the 1971 Honda CB100K1, compare the magnetic drain plug and shift shaft seal against the parts already fitted before combining oil-service and leak-repair purchases.

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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 CB750 CB400 CB350 shift shaft seal 14 x 28 x 7 91206-286-013

Honda CB Shift Shaft Seal ~ 14 x 28 x 7 ~ Replaces 91206-286-013

$4.61 USD
73-0959
Replace your shift shaft seal with this Shift Shaft Seal, 14 x 28 x 7, replacing OEM #91206-286-013. High-quality, made in Japan.Key Features• Shift...
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...
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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 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
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Honda CB100K overhaul gasket set

1970-72 Honda CB100K Overhaul Gasket Set

$29.95 USD
18-0096
Perform a complete engine overhaul on your CB100K with this Engine Overhaul Gasket Set.Key Features• Engine overhaul gasket setFitment / Compatibility• Honda CB100K (1970‑72)Part...
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 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 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)...
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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1971 Honda CB100K1 · Engine Buying guide

Build your order around the repair location

The two featured choices cover a threaded oil drain opening and a rotating shaft seal. Keep their measurements separate and identify the engine actually installed before using the collection to narrow your order.

Parts to consider

Honda CB Magnetic Oil Drain Plug Magnetic Oil Drain Plug12mm diameter with 1.5mm thread pitch; replacement reference 92800-12000.View part Honda CB Shift Shaft Seal ~ 14 x 28 x 7 ~ Replaces 91206-286-013 Shift Shaft Seal14 × 28 × 7 shaft seal, made in Japan; replacement reference 91206-286-013.View part

Choose a specific replacement

The magnetic plug has a 12mm diameter and 1.5mm pitch. The shift shaft seal measures 14 × 28 × 7. Compare those details at the relevant opening rather than selecting both items simply because the engine needs attention.

Keep the wider job in view

A matching part does not tell you whether a damaged thread, shaft surface or another sealing point also needs work. Establish the repair scope first and use appropriate Honda service information to identify the remaining parts and installation requirements.

Ordering questions

How should I compare a drain opening that has already been repaired?

Record the present plug diameter and pitch and any insert or oversize repair. The offered plug is 12mm with 1.5mm pitch; a model-year match cannot establish the thread left by a previous repair.

Which details should I send when asking about a replacement engine?

Give the installed engine identification and the part you are replacing, together with its measurements or markings. Include the drain thread or seal dimensions as relevant rather than relying only on the motorcycle’s year.

Should I add an individual seal when buying a gasket kit?

Check the package you already have for a gearshift seal matching 14 × 28 × 7 and reference 91206-286-013. A general overhaul-gasket-set name does not establish that this shaft seal is included; avoid duplicating a confirmed matching piece.

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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