Check the ignition already fitted to your 1981 CB900C Custom before choosing coils or plugs. The featured replacement coil includes attached leads, the complete switch includes keys and fork-lock function, and the NGK D9EA application explicitly includes this year. Aftermarket ignition equipment needs separate compatibility checks.
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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 /...
1975 Honda CB400F Motorcycle Parts1975 Honda CB500T Twin Motorcycle Parts1975 Honda CB550F Supersport Motorcycle Parts1975 Honda CB750F Motorcycle Parts1976 Honda CB400F Motorcycle Parts1976 Honda CB500T Twin Motorcycle Parts1976 Honda CB550F Supersport Motorcycle Parts1976 Honda CB750A Motorcycle Parts1976 Honda CB750F Motorcycle Parts1977 Honda CB400F Motorcycle Parts1977 Honda CB550F Supersport Motorcycle Parts1977 Honda CB550K Motorcycle Parts1977 Honda CB750A Motorcycle Parts1977 Honda CB750F Motorcycle Parts1977 Honda CB750K Motorcycle Parts1978 Honda CB550K Motorcycle Parts1978 Honda CB750A Motorcycle Parts1978 Honda CB750F Motorcycle Parts1978 Honda CB750K Motorcycle Parts1979 Honda CB650 Motorcycle Parts1979 Honda CB750F Motorcycle Parts1979 Honda CB750K Motorcycle Parts1979 Honda CB750L Motorcycle Parts1980 Honda CB650 Motorcycle Parts1980 Honda CB650C Custom Motorcycle Parts1980 Honda CB750C Motorcycle Parts1980 Honda CB750F Motorcycle Parts1980 Honda CB750K Motorcycle Parts1980 Honda CB900C Motorcycle Parts1981 Honda CB650 Motorcycle Parts1981 Honda CB650C Custom Motorcycle Parts1981 Honda CB750C Motorcycle Parts1981 Honda CB750F Motorcycle Parts1981 Honda CB750K Motorcycle Parts1981 Honda CB900C Motorcycle Parts1981 Honda CB900F Motorcycle Parts1982 Honda CB650 Motorcycle Parts1982 Honda CB650SC Nighthawk Motorcycle Parts1982 Honda CB750C Motorcycle Parts1982 Honda CB750F Motorcycle Parts1982 Honda CB750K Motorcycle Parts1982 Honda CB750SC Motorcycle Parts1982 Honda CB900C Motorcycle Parts1982 Honda CB900F Motorcycle Parts1983 Honda CB750SC Motorcycle PartsHonda CB Electrical & Ignition PartsHonda CB Ignition Systems, Coils & Spark PlugsHonda CB400 Motorcycle Parts by Model & YearHonda CB400F Motorcycle Parts (1975–1977)Honda CB500 Motorcycle Parts by Model & YearHonda CB500T Motorcycle Parts (1975–1976)Honda CB550 Motorcycle Parts by Model & YearHonda CB550F Motorcycle Parts (1975–1977)Honda CB550K Motorcycle Parts (1974–1978)Honda CB650 Motorcycle Parts (1979–1982)Honda CB650 Motorcycle Parts by Model & YearHonda CB650C Custom Motorcycle Parts (1980–1981)Honda CB650SC Nighthawk Motorcycle Parts (1982–1985)Honda CB750 DOHC Parts (1979–1982)Honda CB750 Motorcycle Parts by Model & YearHonda CB750 SOHC Parts (1969–1978)Honda CB750A Hondamatic Motorcycle Parts (1976–1978)Honda CB750C Custom Motorcycle Parts (1980–1982)Honda CB750F Motorcycle Parts (1975–1982)Honda CB750K Motorcycle Parts (1969–1982)Honda CB750SC Nighthawk Motorcycle Parts (1982–1986)Honda CB900 Motorcycle Parts by Model & YearHonda CB900C Custom Motorcycle Parts (1980–1982)Honda CB900F Supersport Motorcycle Parts (1981–1982)Series 3: CB700-750SC (82-86)Series 4: CB900-1100 (80-83)Series 5: CB650 (79-82)Series 6: CB500-CB550 (71-78)Series 8: CB350-CB400 (72-77)
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...
1980 Honda CB750C Motorcycle Parts1980 Honda CB750F Motorcycle Parts1980 Honda CB750K Motorcycle Parts1980 Honda CB900C Motorcycle Parts1981 Honda CB750C Motorcycle Parts1981 Honda CB750F Motorcycle Parts1981 Honda CB750K Motorcycle Parts1981 Honda CB900C Motorcycle Parts1981 Honda CB900F Motorcycle Parts1982 Honda CB750C Motorcycle Parts1982 Honda CB750F Motorcycle Parts1982 Honda CB750K Motorcycle Parts1982 Honda CB900C Motorcycle Parts1982 Honda CB900F Motorcycle Parts1983 Honda CB1000C Motorcycle PartsHonda CB Electrical & Ignition PartsHonda CB Engine Covers & AccessoriesHonda CB Engine PartsHonda CB Ignition Systems, Coils & Spark PlugsHonda CB1000 Motorcycle Parts by Model & YearHonda CB750 DOHC Parts (1979–1982)Honda CB750 Motorcycle Parts by Model & YearHonda CB750C Custom Motorcycle Parts (1980–1982)Honda CB750F Motorcycle Parts (1975–1982)Honda CB750K Motorcycle Parts (1969–1982)Honda CB900 Motorcycle Parts by Model & YearHonda CB900C Custom Motorcycle Parts (1980–1982)Honda CB900F Supersport Motorcycle Parts (1981–1982)Series 4: CB900-1100 (80-83)
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...
1979 Honda CB650 Motorcycle Parts1979 Honda CB750F Motorcycle Parts1979 Honda CB750K Motorcycle Parts1979 Honda CB750L Motorcycle Parts1980 Honda CB650 Motorcycle Parts1980 Honda CB650C Custom Motorcycle Parts1980 Honda CB750C Motorcycle Parts1980 Honda CB750F Motorcycle Parts1980 Honda CB750K Motorcycle Parts1980 Honda CB900C Motorcycle Parts1981 Honda CB650 Motorcycle Parts1981 Honda CB650C Custom Motorcycle Parts1981 Honda CB750C Motorcycle Parts1981 Honda CB750F Motorcycle Parts1981 Honda CB750K Motorcycle Parts1981 Honda CB900C Motorcycle Parts1981 Honda CB900F Motorcycle Parts1982 Honda CB650 Motorcycle Parts1982 Honda CB650SC Nighthawk Motorcycle Parts1982 Honda CB750C Motorcycle Parts1982 Honda CB750F Motorcycle Parts1982 Honda CB750K Motorcycle Parts1982 Honda CB750SC Motorcycle Parts1982 Honda CB900C Motorcycle Parts1982 Honda CB900F Motorcycle Parts1983 Honda CB1000C Motorcycle Parts1983 Honda CB1100F Motorcycle Parts1983 Honda CB550SC Nighthawk Motorcycle Parts1983 Honda CB650SC Nighthawk Motorcycle Parts1983 Honda CB750SC Motorcycle Parts1984 Honda CB650SC Nighthawk Motorcycle Parts1984 Honda CB700SC Motorcycle Parts1985 Honda CB650SC Nighthawk Motorcycle Parts1985 Honda CB700SC Motorcycle Parts1986 Honda CB700SC Motorcycle PartsHonda CB Electrical & Ignition PartsHonda CB Ignition Systems, Coils & Spark PlugsHonda CB1000 Motorcycle Parts by Model & YearHonda CB550 Motorcycle Parts by Model & YearHonda CB550SC Nighthawk Motorcycle Parts (1983–1984)Honda CB650 Motorcycle Parts (1979–1982)Honda CB650 Motorcycle Parts by Model & YearHonda CB650C Custom Motorcycle Parts (1980–1981)Honda CB650SC Nighthawk Motorcycle Parts (1982–1985)Honda CB700SC Nighthawk Motorcycle Parts (1984–1986)Honda CB750 DOHC Parts (1979–1982)Honda CB750 Motorcycle Parts by Model & YearHonda CB750C Custom Motorcycle Parts (1980–1982)Honda CB750F Motorcycle Parts (1975–1982)Honda CB750K Motorcycle Parts (1969–1982)Honda CB750SC Nighthawk Motorcycle Parts (1982–1986)Honda CB900 Motorcycle Parts by Model & YearHonda CB900C Custom Motorcycle Parts (1980–1982)Honda CB900F Supersport Motorcycle Parts (1981–1982)Series 3: CB700-750SC (82-86)Series 4: CB900-1100 (80-83)Series 5: CB650 (79-82)Series 6: CB500-CB550 (71-78)
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...
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...
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...
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...
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...
1979 Honda CB650 Motorcycle Parts1979 Honda CB750F Motorcycle Parts1979 Honda CB750K Motorcycle Parts1979 Honda CB750L Motorcycle Parts1980 Honda CB650 Motorcycle Parts1980 Honda CB650C Custom Motorcycle Parts1980 Honda CB750C Motorcycle Parts1980 Honda CB750F Motorcycle Parts1980 Honda CB750K Motorcycle Parts1980 Honda CB900C Motorcycle Parts1981 Honda CB650 Motorcycle Parts1981 Honda CB650C Custom Motorcycle Parts1981 Honda CB750C Motorcycle Parts1981 Honda CB750F Motorcycle Parts1981 Honda CB750K Motorcycle Parts1981 Honda CB900C Motorcycle Parts1981 Honda CB900F Motorcycle Parts1982 Honda CB650 Motorcycle Parts1982 Honda CB650SC Nighthawk Motorcycle Parts1982 Honda CB750C Motorcycle Parts1982 Honda CB750F Motorcycle Parts1982 Honda CB750K Motorcycle Parts1982 Honda CB750SC Motorcycle Parts1982 Honda CB900C Motorcycle Parts1982 Honda CB900F Motorcycle Parts1983 Honda CB1000C Motorcycle Parts1983 Honda CB1100F Motorcycle Parts1983 Honda CB750SC Motorcycle PartsHonda CB Electrical & Ignition PartsHonda CB Ignition Systems, Coils & Spark PlugsHonda CB1000 Motorcycle Parts by Model & YearHonda CB650 Motorcycle Parts (1979–1982)Honda CB650 Motorcycle Parts by Model & YearHonda CB650C Custom Motorcycle Parts (1980–1981)Honda CB650SC Nighthawk Motorcycle Parts (1982–1985)Honda CB750 DOHC Parts (1979–1982)Honda CB750 Motorcycle Parts by Model & YearHonda CB750C Custom Motorcycle Parts (1980–1982)Honda CB750F Motorcycle Parts (1975–1982)Honda CB750K Motorcycle Parts (1969–1982)Honda CB750SC Nighthawk Motorcycle Parts (1982–1986)Honda CB900 Motorcycle Parts by Model & YearHonda CB900C Custom Motorcycle Parts (1980–1982)Honda CB900F Supersport Motorcycle Parts (1981–1982)Series 3: CB700-750SC (82-86)Series 4: CB900-1100 (80-83)Series 5: CB650 (79-82)
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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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...
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...
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...
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...
1981 Honda CB900C Custom · Ignition Parts Buying guide
Match the transistorized ignition and diagnose by circuit
The original CB900C ignition uses pulser generators, spark units and a mechanical advancer. It does not use contact points. Identify any aftermarket ignition before selecting coils, plugs or replacement electronics.
The 1981 U.S. standard specification is NGK D9EA. Canadian specifications use a resistor plug. The 1981 Honda addendum also lists resistor versions as optional for the U.S. Match the motorcycle’s market and any changed ignition equipment rather than choosing solely by thread fit. The featured Rick’s coil is supplied with attached wires. Other coils may need separate leads and must meet the ignition maker’s electrical and mounting requirements.
Separate switch contacts from lock damage
The complete ignition switch includes its fork-lock function and keys. Repair kit 12-0064 is for the specified replacement-switch base design; it is not a universal repair for every original switch, a worn key barrel or a heat-damaged loom connector.
Practical questions
Does this motorcycle need contact points at a tune-up?
The original system is transistorized, so it has no contact-point set or points gap to adjust. Check plugs, connections and ignition components using the correct Honda procedure; identify any conversion before buying parts.
What does losing spark on two cylinders suggest?
The original coils serve pairs 1 and 4, and 2 and 3. A fault affecting one pair makes its shared coil, supply, wiring and ignition channel worth checking, but does not prove the coil alone is faulty.
Can I use any coil advertised for a four-cylinder Honda?
No. Match the ignition system’s required coil resistance, wiring arrangement, mounting and plug-lead connections. A broad model tag or similar appearance is not enough, especially after an electronic-ignition conversion.
Not sure which part you need?
Send your model and year, plus photos of your existing part and any changes to the original setup.