2003-2005 Suzuki LT-A500F Service Manual, Page 21Get this manual
PERIODIC MAINTENANCE
SPARK PLUG
Inspect every 000 km (1 200 miles, months)Replace every 000 km (4 000 miles) Remove the fuel tank cover(7-5) Disconnect the spark plug cap and remove the spark plug Standard NGK DENSO CR6E U20ESR-N Cold type CR7E U22ESR-N