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1981 Honda CB900F Ignition Switch, Coils & Units

The 1981 CB900F Supersport ignition choices include a keyed switch, replacement coils and separate spark units. Decide which part of the system has failed, then compare the references and supplied leads before ordering for a standard or modified ignition setup.

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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.
Currently viewing Ignition Systems, Ignition Switch, Coils, Plugs, Contact Points

Honda motorcycle parts

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

Honda CB1000 CB900 CB750 CB700 spark plug cap SD05F

Honda CB750 Spark Plug Cap – SD05F

$10.49 USD
23-3115
Replace your spark plug caps with this Spark Plug Cap, SD05F type. Two required per CB750.Key Features• Spark plug cap, SD05F• 2 required per...
Sale
Honda CB900 CB750 CB650 CB550 CB400 ignition switch 35010-377-007

Honda CB Ignition Switch ~ Replaces 35010-377-007

$46.98 $44.95 USD
You save $2.03
12-0051
Restore a late-'70s or DOHC-era CB's ignition with this Ignition Switch with fork lock and keys, replacing OEM #35010-377-007 / #35100-377-003/007 / #35100-422-017 /...
Honda CB900 CB750 CB650 CB550 switch repair kit

Honda CB900/CB750/CB650/CB550 Switch Repair Kit

$14.95 USD
12-0064
Rebuild your Honda ignition switch base with this Switch Repair Kit, including the base cover. Designed for use with our #12-0051 ignition switch (sold...
Honda CB1100 CB1000 CB900 CB750 CB650 spark plug cap XD05F

Honda CB Spark Plug Cap ~ XD05F

$10.49 USD
23-3119
Replace your spark plug caps with this Spark Plug Cap, XD05F type. Two required per CB750. Key Features• Spark plug cap, XD05F• 2 required...
Honda CB1000 CB900 CB750 spark advancer cover screw set 93700-06025-0A

Honda CB1000 / CB900 / CB750 Spark Advancer Cover Screw Set ~ Replaces 93700-06025-0A

$3.50 USD
73-0900
Replace your spark advancer cover screws with this Spark Advancer Cover Screw Set of 3 in 6x25 size, replacing OEM #93700-06025-0A.Note: the 1980 bikes...
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Honda CB1100 CB1000 CB900 CB750 CB700 ignition coil 30500-422-003

Honda CB Ignition Coil ~ Replaces 30500-422-003

$64.95 USD
17-6803
Replace your DOHC CB's ignition coil with this Replacement Ignition Coil, replacing OEM #30500-422-003 / #30500-422-013. Broad fitment across the 1979-82 CB750 family, CB750SC/CB700SC...
Honda CB900 CB750 CB650 CB550 switch base cover

Honda CB900/CB750/CB650/CB550 Switch Base Cover

$4.95 USD
12-0065
Replace just the base cover on your Honda ignition switch with this Switch Base Cover. Designed for our #12-0051 ignition switch (sold separately) with...
Dynatek 3 ohm ignition coil set 2 with plug wires Honda CB

Dynatek Performance 3 Ohm Ignition Coil Set/2 with Plug Wires

$389.00 USD
07-9974
Combine Dynatek's performance coils with matching plug wires in one package using this Dynatek Performance Dual-Output 3 Ohm Ignition Coil Set of 2 with...
Honda CB1100 CB1000 CB900 CB750 replacement coil tower boots

Honda CB1100 / CB1000 / CB900 / CB750 Replacement Coil Tower Boots

$4.95 USD
17-6830
Replace the tower boots on your performance coils with this Coil Tower Boots 2-pack. Fits performance coils #17-6810, #07-9973, #07-9979, and #07-9980.Key Features• Coil...
Honda CB900C CB900F NGK D9EA spark plug

1980-81 Honda CB900C / CB900F NGK D9EA Spark Plug

$7.87 USD
50-8603
Replace your spark plugs with these NGK D9EA Spark Plugs.Key Features• NGK D9EA spark plugFitment / Compatibility• Honda CB900C (1980‑81) Custom• CB900F (1981) SupersportPart...
Dynatek 3 ohm ignition coil set 2 Honda CB

Dynatek Performance 3 Ohm Ignition Coil Set/2

$289.00 USD
07-9980
Match your Dyna-style electronic ignition requirement with this Dynatek Performance Dual-Output 3 Ohm Ignition Coil Set of 2. Same Dynatek quality as the 5...
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Honda CB1100 CB1000 CB900 CB750 ignition spark units 30400-MA4-601

Honda CB Ignition Spark Units ~ Replaces 30400-MA4-601

$219.00 USD
14-0504
Replace your DOHC CB's factory ignition spark units with this Aftermarket Ignition Spark Unit, an affordable alternative to the Honda OKI or NEC units....
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Honda CB1100 CB1000 rick's electrics brand ignition coil 30500-422-003

Honda CB Rick's Electrics Brand ~ Ignition Coil ~ Replaces 30500-422-003

$119.95 USD
24-6011
Replace your DOHC CB ignition coil with this Rick's Electric Replacement Ignition Coil, replacing OEM #30500-422-003 / #30500-422-013. Comes with wires attached.Two coils used...
Honda CB750 DOHC CB900 CB1100 dynatek dyna 2000 ultimate kit

1979-83 Honda CB750 DOHC / CB900 Dynatek Dyna 2000 Ultimate Kit

$999.00 USD
07-9989
Go all-in on the DOHC CB750, CB900, or CB1100 with this Dyna 2000 Digital Performance CDI Ignition Ultimate Kit. Includes the Dyna 2000 ignition...
Honda CB1100 CB900 CB750 performance high output 3.3 ohm coil

Honda CB1100 / CB900 / CB750 Performance High Output 3.3 Ohm Coil

$119.95 USD
17-6810
Upgrade your CB750 or big-bore DOHC CB with this Performance Dual Output Ignition Coil, a 3.3 Ohm dual-tower type with hardware. Replaces stock factory...
Honda CB750 DOHC CB900 dynatek dyna 2000 ignition system

1979-83 Honda CB750 DOHC / CB900 Dynatek Dyna 2000 Ignition System

$795.00 USD
07-9991
Get just the digital ignition module for your DOHC CB with this Dyna 2000 Digital Performance CDI Ignition. No coils, no wires, just the...
Honda CB1100 CB900 CB750 coil high tension wire ends (pk 2)

Honda CB1100 / CB900 / CB750 Coil High Tension Wire Ends (Pk/2)

$3.50 USD
17-6831
Replace the high-tension wire ends that fit inside your coil towers with this 2-pack of Coil High-Tension Lead Ends. Same fitment as our tower...
Honda CB750 CB900 CB1100 performance 5.2 ohm ignition coil

Honda CB Performance 5.2 Ohm Dual-Output Ignition Coil

$129.95 USD
07-9973
Step up your ignition with this Performance High Output 5.2 Ohm Dual-Output Ignition Coil. Primary resistance of 5.2 Ohm, secondary of 17K Ohm, designed...
Honda CB900C CB900F NGK DR9EIX spark plug

1980-81 Honda CB900C / CB900F NGK DR9EIX Spark Plug

$22.95 USD
50-8606
Replace your spark plugs with these NGK DR9EIX Spark Plugs.Key Features• NGK DR9EIX spark plugFitment / Compatibility• Honda CB900C (1980‑81) Custom• CB900F (1981) SupersportPart...
Honda CB750 DOHC CB900 CB1100 dynatek dyna 2000 premium kit

1979-83 Honda CB750 DOHC / CB900 Dynatek Dyna 2000 Premium Kit

$899.00 USD
07-9990
Upgrade your DOHC CB with the digital Dyna 2000 ignition in a middle-tier kit configuration. This Dyna 2000 Digital Performance CDI Ignition Premium Kit...
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1981 Honda CB900F Supersport · Ignition Parts Buying guide

Diagnose the ignition channel before replacing parts

The original CB900F ignition is transistorized, with separate spark units and coils. A fault affecting one cylinder pair calls for checks of that channel’s plugs, caps, leads, coil, pulser circuit and wiring before replacing a spark unit.

Parts to consider

Honda CB Ignition Switch ~ Replaces 35010-377-007 Ignition switch with keysIgnition switch with fork lock and keys, listed for the 1981–82 CB900F.View part Honda CB Rick's Electrics Brand ~ Ignition Coil ~ Replaces 30500-422-003 Rick's replacement ignition coilWires attached; replaces references 30500-422-003 and 30500-422-013.View part Honda CB Ignition Spark Units ~ Replaces 30400-MA4-601 Replacement ignition spark unitAftermarket alternative to Honda OKI/NEC units; reference 30400-MA4-601.View part

Related parts: Ignition switch base repair kit

Compare coils by electrical requirements as well as supplied leads

The Rick’s replacement coil has wires attached; coil 17-6803 requires separate 7mm high-tension leads. Aftermarket ignition systems have their own coil-resistance and suppression requirements. Do not select a lower-resistance coil or a different cap arrangement simply because it appears in this category.

Check the plug specification for the motorcycle’s market

Honda’s 1981 F specification lists D9EA as the standard U.S. NGK plug and DR8ES for Canada. The catalogue’s D9EA and DR9EIX listings should not be turned into one universal market recommendation. Match the full plug code and the installed ignition before ordering.

Buying questions

Does the original CB900F need contact points?

No. Honda specifies transistorized ignition. Identify the actual ignition hardware before ordering, especially if an aftermarket system has been fitted; the broad category title does not make points parts suitable.

Does loss of spark on a cylinder pair prove the spark unit has failed?

No. One unit controls an ignition channel, but the coil, leads, caps, pulser circuit, supply and grounds must also be checked. Use the Honda test sequence to identify the fault before buying the electronic unit.

Will new ignition keys operate the seat or helmet lock?

The supplied keys are for the replacement ignition and fork-lock assembly. Matching separate locks is not promised. Plan for separate keys unless the locks are professionally matched, and confirm the switch connector and mounting before ordering.

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Parts categories for 1981 Honda CB900F

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