Honda motorcycle parts
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1980 Honda CB900C Custom · Electrical Buying guide
Separate a no-crank fault, a cranking engine with no spark, a charging problem and a warning-light fault. They share wiring and a battery, but they do not necessarily need the same replacement part.
1980 Custom main wire harnessMain loom for the 1980 CB900C Custom, replacing reference 32100-461-000. Its application is specific to this model year.View part
Rick’s ignition coil with wiresReplacement coil supplied with wires attached. Two coils are used on the motorcycle; choose the quantity needed for your repair.View part
Eight-wire rectifier/regulatorRick’s replacement unit with two plugs: a four-position connector carrying three wires and a six-position connector carrying five wires.View part
Related parts: Ignition coil connecting harness · Air-sensor lead and rubber cover · Starter-clutch roller, cap and spring kit
The 1980 Custom main-harness reference is 32100-461-000. Identify damaged wiring before choosing a complete loom or a short sub-harness. The ignition-coil connecting harness is a separate item; do not assume every branch lead comes with the main loom.
The original ignition is transistorized, with two coils serving cylinder pairs. Check the ignition supply, leads and connectors before condemning a coil or spark unit. For charging faults, test the battery, wiring and alternator before replacing the regulator.
A loom helps when its wiring or connectors are damaged. Loose battery cables, poor grounds, failing switches and faulty components can cause similar symptoms, so trace the affected circuit before replacing the whole harness.
Separate ignition from fuel or engine faults. Check for spark using the service procedure, then inspect the ignition power supply, coil connections, plug leads and plugs. A starter relay replacement will not by itself restore missing spark.
Check charging performance and wiring connections, then look for an unintended drain while parked. A new battery can temporarily mask a charging or wiring fault without correcting it.
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