PERIODIC MAINTENANCE 2-5 SPARK PLUG Inspect every 6 000 km (4 000 miles, 12 months). replace every 12 000 km (7 500 miles, 24 months). SPARK PLUG AND IGNITION COIL/PLUG CAP REMOVAL • Remove the front seat. (8-7) • Lift and support the fuel tank. (5-3) • Remove the air cleaner box. (5-13) • Disconnect all lead wire couplers from ignition coil/plug caps.  Disconnect the lead wire coupler before removing the ignition coil/plug cap to avoid lead wire coupler dam- age. • Remove the ignition coils/plug caps.  * Do not pry up the ignition coil/plug cap with a screw driver or a bar to avoid its damage. E * Be careful not to drop the ignition coil/plug cap to L prevent short/open circuit. P • Remove the spark plugs with a spark plug wrench. HEAT RANGE M • Check spark plug heat range by observing electrode color. If A the electrode of the spark plug is wet appearing or dark color, replace the spark plug with hotter type one. If it is white or S glazed appearing, replace the spark plug with colder type one. Hot type Standard Cold type NGK CR8E CR9E CR10E ND U24ESR-N U27ESR-N U31ESR-N NOTE: “R” type spark plug has a resistor built into at the center elec- trode to prevent radio noise. CARBON DEPOSITS • Check carbon deposits on the spark plug. • If carbon is deposited, remove it using a spark plug cleaner machine or carefully use a tool with a pointed end.