2005-2007 Polaris Ranger 500 service manual, Page 201Get this manual
CLUTCHING TROUBLESHOOTING
Situation Engine RPM below specified operating range, although engine is properly tunedProbable Cause -Wrong or broken drive clutch spring-Drive clutch shift weight too heavyRemedy -Replace with recommended spring-Install correct shift weight kit to match engine application
-Driven clutch spring broken or installed in wrong -Replace spring; refer to proper installation locationhelix location-Drive clutch bindingADisassemble drive clutch; inspect shift weights for wear and free operationBClean and polish stationary shaft hub; reassemble clutch without spring to determine problem areaReplace beltAReplace ramp buttonsBInspect movable sheave for excessive bushing clearance
Erratic engine operating RPM -Belt worn unevenlythinburnt spotsduring acceleration or load variations-Driven clutch malfunction