2007 Polaris Two Stroke Snowmobile Workshop Repair manual, Page 156Get this manual
CLUTCHING Adjusting Belt Deflection
123Loosen the jam nut (E)Using an 18" Allen head wrench, turn the stud (F) counter-clockwise to decrease belt deflection and clockwise to increase belt deflectionWhen the proper belt deflection is achieved torque the lock nut (E) to 90-110 in-lb(10-12Nm)