1986 Ski-Doo Factory Shop Manual, Page 249Get this manual
Section 03 TRANSMISSION SUb-section 02 (DRIVE BELT)
Alpine model
1Remove hood, belt guard and pulley guard2 Remove the two bolts tAl holding bearIng support to the frame
CITATION LSILSE TUNDRA TUNDRA LT FORMULA MX FORMULA PLUS ELAN, ALPINE, ALL SKANDIC, ALL SAFARIFORMULA SP
30.2Sa.1 mm
25.431.B mm 11"14")
To check tension
Position reference rule on drive beltWooden stick and fish scale method:
Mark specified measure
3, Pivot the bearing support assembly half turn4Open the driven pulley by twisting and pushing the sliding half 5Hold in open position 6Slip the belt over the top edge of the fixed half7, Slip the belt out from the drive pulley8, Remove from vehIcle by pasSing II under the driven pulley and bearing supportAOIJWQJOO5