2004 Ski-Doo Racing Handbook, Page 100Get this manual
SECTION 04ENGINE PREPARATION
NOTE: Carefully clean screws before reinstallation, specifically under screw headInstall exhaust manifold with gasketsDo not tighten yetTorque cylinder screws in crisscross sequence as per the following tableM8 M10 29 Nm (21 lbfft) 40 Nm (29 lbfft)
17, Reed Valve
All Engines Blades have curved shapeInstall with their curve facing reed blockWith blade stopper no16 removed, check reed valve for proper tightnessThere must not be any play between blade and valve body when exerting finger pressure on blade at blade stopper locationIn case of play, turn blade upside down and recheckIf there is still play, replace blade andor valve bodyCheck distance from blade stopper outer edge and distance from center of reed valve block