1997 Ski-Doo Factory Shop Manual Volume Two, Page 80Get this manual
Quality of the image is intentionally reduced!
Sub-Section 03
2, Cylinder Head Screw
ENGINE TYPE 454, 494, 583 and 670 CYLINDER HEAD SCREWS TIGHTENING TORQUE 29 Nm (21 lbfft) Apply grease under screw head
A24C08A