2002 Bombardier Quest 650XT Service Manual, Page 210Get this manual
Section 05 ELECTRICAL Subsection 05 (IGNITION SYSTEM)
SPARK PLUG INSTALLATION
Prior to installation make sure that contact surfaces of the cylinder head and spark plug are free of grime1Using wire feeler gauge, set electrode gap to 0.7 mm (.027 in)2Apply anti-seize lubricant over the spark plug threads to prevent possible seizure3Hand screw spark plug into cylinder head, with the ignition coil, and tighten with torque wrench and proper socket