Honda motorcycle parts
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1982 Honda CB900C Custom · Electrical Parts 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.
Custom main wiring loomMain harness for the 1981–82 CB900C Custom, replacing Honda reference 32100-461-770.View part
NGK DR8EA spark plugResistor replacement for the original DR8ES specification; NGK’s replacement table maps DR8ES to DR8EA.View part
Oil-pressure switchReplacement oil-pressure switch referencing Honda 37240-P13-013.View part
The 1982 Custom main-harness reference is 32100-461-770. 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.
Honda specified a resistor DR8ES plug for 1982; NGK lists DR8EA as its replacement. The oil-pressure switch is a warning-circuit component. Stop the engine if the oil-pressure warning remains on while running, then check actual oil pressure and the warning circuit rather than simply fitting a new switch.
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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