2003 Kawasaki JetSki 800 SX-R Factory service manual, Page 36Get this manual
2-20 PERIODIC MAINTENANCE Periodic Maintenance Procedures
Spark Plug Cleaning
a Clean the electrodes and the ceramic insulator around the center electrode with an abrasive blasting deviceo Be certain that all abrasive particles are removed from the plugClean the entire plug in high flash-point solvent