2002 Bombardier Quest 650XT Service Manual, Page 104Get this manual
Subsection 08
Section 03 ENGINE (CYLINDER AND HEAD)
Install NEW rocker arm shaft screws no8Torque as per following procedure: CAUTION: This assembly use stretch screwsAs the screws have been stretched from the previous installation, it is very important to use new screws at assemblyFailure to replace screws and to strictly follow the torque procedure may cause screws to loosen and lead to engine damage torque screws at half of the recommended torque value in the exploded view torque screws at the recommended torque value finish tightening screws turning an additional 90 rotation with torque angle gauge.R610motr101A