AMERICAN IRONHORSE Classic SX, User Manual

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S P A R K P L U G S / I G N I T I O N S Y S T E M
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4-11/4-12
DET
AILED MAINTENANCE PROCEDURES
Spark plugs should be inspected, cleaned and gap measured (and adjusted if required) at every
recommended inspection and maintenance interval. Spark plugs should be replaced at a minimum of every
12,000 miles. (It is recommended that they be replaced every 2,500 miles for optimum
vehicle performance.)
When replacing your vehicle’s spark plugs:
• Always replace with same as original equipment plugs as indicated in the “AMERICAN IRONHORSE
Consumable Table.”
• Ensure the gap setting is .040. An appropriate spark plug feeler gauge should be used.
• Never remove spark plug wires from plugs by pulling on wires. Always grasp the molded rubber spark
plug cap for removal of wires.
• Spark plugs should be tightened down to about 100 inch pounds to ensure proper, continuous operation.
Your AMERICAN IRONHORSE is equipped with one of the most advanced, electronic ignition systems
presently available on the market. Only a professionally trained mechanic should address its sophisticated
electronic operation. As set at the factory, your ignition system optimizes fuel consumption, engine horsepower and
exhaust emissions. It should not be adjusted except by a professional motorcycle mechanic familiar with its
operation and functions utilizing the appropriate equipment.