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1972 Honda CB100K2 Electrical Parts

The 1972 Honda CB100K2 electrical selection covers several quite different jobs: operating the rear brake light, replacing a screw-on reflector and sealing a turn signal. Choose by the assembly needing attention, then check any changes to the original equipment.

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Honda motorcycle parts

Choose your model and year to see parts listed for your bike.

Honda CB750 CB550 CB500 CB450 CB400 rear brake light switch

Honda CB Rear Brake Light Switch

$10.33 USD
12-0008
Replace your rear brake light switch with this Rear Brake Light Stop Switch. Exceptionally broad fitment across the SOHC CB750 lineup and virtually the...
Honda CB750 CB550 CB500 CB450 CB400 reflector 33741-340-670

Honda CB Stock Type Reflector ~ Replaces 33741-340-670

$21.46 USD
11-2303
Restore your mid-'70s Honda's stock reflectors with this Stock-Type Screw-On Reflector with a 6mm thread, replacing OEM #33741-340-670. Broad fitment covering the 1972-78 CB750...
New
Honda CB750 CB650 CB550 CB500 tail light cover gasket 33709-341-671

Honda CB Tail Light Cover Gasket ~ Replaces 33709-341-671

$5.80 USD
11-2163
Replace the gasket on your 1972-onward Honda's tail light lens with this Tail Light Lens Gasket, replacing OEM #33709-341-671. Matches the fitment of our...
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Honda CB750 CB125 CB100 rear brake light switch spring 35357-107-010

Honda CB750 / CB125 / CB100 Rear Brake Light Switch Spring ~ Replaces 35357-107-010

$7.00 $6.50 USD
You save $0.50
73-0848
Replace your rear brake stop switch spring with this Rear Brake Light Stop Switch Spring. This is the spring that attaches to the rear...
Honda CB750 CB450 CB350 CB200 CB175 front cable clip 45465-270-000

Honda CB Front Cable Clip ~ Replaces 45465-270-000

$7.00 USD
73-1116
Keep your wiring clean and secure with this Front Cable Clip, designed to hold the stop switch wires neatly against the front cable. Replaces...
Honda CB750 CB500 CB450 CB400 turn signal lamp gasket 33443-268-671

Honda CB Turn Signal Lamp Gasket ~ Replaces 33443-268-671

$4.61 USD
11-2085
Service your early CB750 or classic twin turn signal with this Turn Signal Lamp Gasket, replacing OEM #33443-268-671. Pairs with our signal lens #11-2110...
New
Honda CB900 CB200 CB175 CB125 5.25 in. battery band 95012-15001

Honda CB 5.25 in. Stock Type Battery Band ~ Replaces 95012-15001

$8.95 USD
99-4991
Upgrade or restore your motorcycle’s battery mounting system with this Stock Type Battery Band — a quality replacement designed to keep your battery securely...
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Honda CB200 CB175 CB125 CB100 Denso ignition contact points 30202-107-004

Honda CB200 / CB175 / CB125 / CB100 Denso Ignition Contact Points ~ Replaces 30202-107-004

$8.95 USD
14-0004
Replace your Nippondenso-ignition points with this Denso Contact Points (1 piece), replacing OEM #30202-107-004 / #30202-216-004 / #30202-107-154.Important: these points are for Nippondenso ignitions...
Honda CB125S CB100K bar switch assembly left (clutch) side 35300-107-671

1970-74 Honda CB125S / CB100K Bar Switch Assembly ~ Left (Clutch) Side ~ Replaces 35300-107-671

$28.95 USD
12-0311
Fit the polished left-side handlebar controls on your CB100 or CB125S with this Bar Switch Assembly for the Clutch Side in polished finish, replacing...
Universal motorcycle spark plug cap LD05F

Universal Motorcycle Spark Plug Cap ~ LD05F

$8.95 USD
23-3118
Spark Plug Cap - LD05F for custom or restoration work on classic Honda CB motorcycles.  Key Features Aftermarket part Sold as: Each Fitment /...
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New
Honda CB125S CB100K ignition switch 35100-324-761

1970-75 Honda CB125S / CB100K Ignition Switch ~ Replaces 35100-324-761

$15.26 USD
29-0082
Replace your ignition switch with this Ignition Switch with 2 keys, 2 wires. Replaces OEM #35100-324-761 / #35100-111-671 / #35100-240-010 / #35100-324-000.Key Features• Ignition...
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1972 Honda CB100K2 · Electrical Buying guide

Separate switching faults from lamp and reflector repairs

A switch, reflector and lens gasket solve different problems. Start with the damaged or faulty assembly rather than a broad electrical-parts list, and compare its attachment or sealing details with the replacement.

Parts to consider

Honda CB Rear Brake Light Switch Rear Brake-Light SwitchReplacement rear stop-light switch with CB100K 1970–72 application. Compare the fitted mounting and wiring before ordering.View part Honda CB Stock Type Reflector ~ Replaces 33741-340-670 Screw-On ReflectorStock-type reflector with a 6mm mounting thread; replacement reference 33741-340-670. The application includes the 1972 CB100K.View part Honda CB Turn Signal Lamp Gasket ~ Replaces 33443-268-671 Turn-Signal Lamp GasketSignal-lamp sealing gasket, replacement reference 33443-268-671. Check the fitted lens and housing for a matching gasket seat.View part

Related parts: Rear stop-switch spring · Nippondenso-only contact points

Check the operating spring as part of the switch order

The linked rear stop-switch spring replaces 35357-107-010 and attaches to the stop-light switch. Inspect that connection with the switch mounting. Confirm the switch package before buying both, since the written switch details do not establish whether its spring is supplied.

Identify the ignition system before buying points

The linked contact points are for Nippondenso ignitions only. Hitachi and Kokusan systems are explicitly excluded. Read the maker identification on the installed ignition before ordering; the same model year can appear in an application list without resolving which ignition equipment remains on the bike.

Ordering questions

Can I choose contact points by the year alone?

Identify the installed ignition first. These linked points require Nippondenso equipment and exclude Hitachi and Kokusan systems. A 1972 CB100K2 application by itself cannot choose between those ignition types.

What should I compare before replacing the rear brake-light switch?

Compare the switch mounting, wiring connections and spring attachment with the fitted assembly. Establish which component needs replacement before ordering; the actuating spring is also available as a separate part.

Will this reflector attach to a replacement bracket?

Compare the bracket with the reflector’s 6mm threaded fixing. If the bracket differs from the original, confirm the thread pitch and usable stem length before buying; those measurements are not provided in the written specifications.

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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