2002 Ski-Doo Shop Manual Volume One, Page 195Get this manual
Section 05 TRANSMISSION Subsection 02 (DRIVE BELT)
Using spring scale and stick, apply specified force on drive belt halfway between pulleys as shown
1Slide lower O-ring of tester to specified deflection2Slide upper O-ring of tester until reaching mark (zero)3Apply pressure until lower O-ring is flush with edge of rule and read force on the upper scale at top edge of O-ring2