2008 Polaris ATV Sportsman 300 400 H.O. Service Manual, Page 130Get this manual
CVTTRANSMISSION Engine Braking Clutch
The engine braking clutch is one-way clutch located inside the starting clutch hubThis clutch "locks" the starting clutch hub to the crankshaft whenever drive belt (and drive clutch) speeds exceed the engine RPM, such as when travelling down hill with the throttle released, which provides engine brakingRefer to Chapter "Engine" for more information
CVT Drying
NOTE: If operating the ATV through water, be sure to check the CVT system components for water ingestionThe ATV should be checked immediatelyRefer to Owner's Manual for Safe Riding Tips1Remove the CVT drain plug and O-ring located on the bottom of the CVT cover
CVT MaintenanceInspection