Finding the right coil for your 1987 Harley-Davidson Sportster 1000 can be tricky, but understanding the system and potential issues will help you get back on the road. This guide covers identifying problems, locating the correct replacement coil, and completing the installation.
Identifying Coil Problems on Your 1987 Sportster 1000
Before you jump to replacing the coil, let's diagnose the issue. A faulty ignition coil is a common culprit behind several problems on an 87 Sportster 1000. Symptoms include:
- Misfiring: Sporadic engine sputtering or complete engine failure. This is often accompanied by backfiring.
- Hard Starting: Difficulty starting the engine, requiring multiple attempts.
- No Spark: A complete lack of spark at the spark plugs is a clear indicator of coil failure. This requires testing with a spark tester.
- Poor Engine Performance: Noticeable loss of power, sluggish acceleration, or rough running.
Important Note: Before assuming coil failure, eliminate other potential causes like faulty spark plugs, plug wires, ignition switch, or points (if your model utilizes them). A thorough diagnostic process is crucial to pinpoint the actual problem.
Testing Your 1987 Sportster 1000 Coil
While a visual inspection might reveal obvious damage (cracks, burns), a proper test is essential for confirmation. You'll need a multimeter capable of testing resistance and possibly an inline spark tester. Refer to your Harley-Davidson service manual for specific testing procedures and resistance specifications for your 1987 Sportster 1000's ignition coil. These specifications vary slightly depending on the exact model and configuration. Improper testing can lead to inaccurate conclusions.
Locating the Correct Replacement Coil
Once you've confirmed a faulty coil, finding the right replacement is key. Using the incorrect coil can lead to further complications.
- Part Number Identification: The best way to ensure you get the correct part is to locate the original part number on your existing coil or consult your Harley-Davidson service manual. This number is critical for ordering the correct replacement.
- Year and Model Specificity: 1987 Sportster 1000 models might have slight variations, so specifying the exact model (e.g., XL1000S, XL1000C) when ordering a replacement is crucial.
- Reputable Suppliers: Purchase your replacement coil from reputable Harley-Davidson parts dealers or motorcycle parts suppliers. Avoid aftermarket coils of unknown quality, as they might not meet the necessary specifications and could compromise your engine's performance and longevity.
Installing the Replacement Coil
Replacing the ignition coil on a 1987 Sportster 1000 is generally straightforward. However, always consult your service manual for detailed instructions and diagrams specific to your model. This will help avoid potential errors during installation.
The process typically involves:
- Disconnecting the Battery: Always disconnect the negative battery terminal before working on any electrical components.
- Removing the Old Coil: Carefully disconnect the wiring harness and remove the mounting screws holding the coil in place.
- Installing the New Coil: Mount the new coil, ensuring it's securely fastened and the wiring harness connections are correctly made.
- Reconnecting the Battery: Once everything is in place, reconnect the negative battery terminal.
Post-Installation Check: After installation, verify proper function by attempting to start the engine. If the problem persists, double-check all connections and consider seeking professional assistance from a qualified motorcycle mechanic.
Remember that working on your motorcycle's electrical system requires care and precision. If you're uncomfortable performing the repair yourself, it's always best to seek professional help from a trusted mechanic specializing in Harley-Davidsons. This ensures your motorcycle’s safety and longevity.
