2013 600 IQ Racer Service Manual 9923892, Page 167Get this manual
ELECTRICAL SYSTEMS SWITCHES
Brake Light
Switch Yellow Orange Lever Free Lever Depressed X
Tether Switch
Switch Black Brown Inserted Removed X
VARIABLE EXHAUST SYSTEM (VES)
Overview
The Polaris VES system uses exhaust valves (1 per cylinder) to control the exhaust port heightThe valves are actuated by controlling cylinder pressure with solenoid, bellows, and series of hosesAt idle speed and up to pre-determined level, the solenoid's ground path is closed by the CDIThis action opens the solenoid's internal valve and allows the cylinder pressure to vent into the atmosphereDuring this time the valves are downTo raise the valves, the CDI will cut the solenoid ground path which will close the vent path to atmosphereThe cylinder pressure will then act upon each valve bellows which will raise each valveOn IQ 600 Racer engines, the solenoid is off at any RPM whenever the throttle lever is below 100 openWhen the throttle lever is at 100 (WOT), the solenoid remains powered until 7100 RPMNOTE: Solenoid PoweredVent Path Open Solenoid OffVent Path Closed