1999 Ski-Doo Factory Shop Manual Volume Three, Page 169Get this manual
Section 05 TRANSMISSION Subsection 02 (DRIVE BELT)
DRIVE BELT DEFLECTION MEASUREMENT
NOTE: The drive belt deflection measurement must be performed each time new drive belt is installedNOTE: To obtain an accurate drive belt deflection measurement, it is suggested to allow break-in period of 50 km (30 mi)Before checking the belt deflection, ensure vehicle has the proper belt (refer to the application chart)Adjust pulley distance and alignmentRefer to PULLEY DISTANCE AND ALIGNMENT 05-05To obtain maximum vehicle performance, the belt tension must be adjusted according to specifications shown in the accompanying chartDEFLECTION mm (in) 38 (1.496 .197) FORCE kg (lb) 11.5 (25) HEIGHT OVER DRIVEN PULLEY1.5 mm (0116'')