1984 Ski-Doo Shop Manual, Page 232Get this manual
SECTION 03 TRANSMISSION SUB-SECTION 05 (PULLEY DISTANCE AND ALIGNMENT)
Pulley distance specification
SKANDIC 377R
U1 mm (1116") ma x101 34 mm (1 11 32" )
Pulley distance adjustment method
Oversize holes on countershaft support and slotted lugs on chaincase casting allow movement of the countershaft
Floating driven pu)ley
Drive pulley movement
Pulley distance specification
Countershaft support Chaincase