2009 Polaris Scrambler 500 4x4 2x4 factory service manual, Page 157Get 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 heavy-Driven clutch spring broken or installed in wrong helix locationRemedy -Replace with recommended spring-Install correct shift weight kit to match engine application-Replace spring; refer to proper installation location