2005-2007 Polaris Ranger 500 service manual, Page 54Get this manual
MAINTENANCE Spark Plug Service
1Remove spark plug high tension lead (A)Clean plug area so no dirt and debris can fall into engine when plug is removed8Install spark plug and torque to specification
Recommended Spark Plug: NGK BKR5E Spark Plug Torque: 14 FtLbs(19 Nm)
Engine To Frame Ground