2000 Polaris Indy 500 / 600 snowmobile service manual, Page 194Get this manual
CLUTCHES Drive Belt Belt Deflection
Too much belt deflectionIf the belt is too long or the center distance too short, the initial starting ratio will be too high, resulting in performance lossThis is due to the belt rising too high in the drive clutch sheaves upon engagementBelt too high on initial engagement