2002-2007 Suzuki 500 LTA 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( Disconnect the spark plug cap Standard NGK DENSO CR6E U20ESR-N 7-5) and remove the spark plug Cold type CR7E U22ESR-N