Polaris 650 2023 Owner's Manual page 147

ELECTRONIC VARIABLE EXHAUST SYSTEM
(E-VES) MAINTENANCE
Improper cleaning or valve assembly installation may cause severe engine
damage! The ECU must be programmed by an authorized dealer if any
component in the E-VES system is replaced or improperly serviced.
The engine in your Polaris snowmobile is equipped with E-VES. Periodic valve
inspection and cleaning is not required or recommended as the exhaust valves
do not rely on combustion pressure for operation. The E-VES system is
designed to work when oil and carbon deposits form on the valves.
At the time of assembly, the valve range of travel is programmed into the engine
management system. If blade travel is restricted for any reason, the engine
management system will alert the rider and turn on the check engine MIL.
E-VES service should only be performed by an authorized Polaris snowmobile
dealer who has the tools and diagnostic software to properly service and
program the system.
During engine break-in, E-VES diagnostic codes may appear during engine
operation as the valves wear into their cylinder slots. Contact your authorized
dealer if the check engine MIL remains illuminated after the break-in period.
QUICKDRIVE
QUICKDRIVE BELT CONDITION
Periodically check the condition of the QUICKDRIVE belt. Inspect the belt for
signs of excessive wear, frayed edges, missing cogs and cracks.
Replace the QUICKDRIVE belt every 2000 miles (3200 km) and whenever
inspection reveals excessive wear or damage. Special tools are required to
remove and install the QUICKDRIVE belt. A Polaris dealer or other qualified
technician can assist with this service, or refer to the instructions provided with
the purchase of a new belt.
Improper track tension can result in track ratcheting, which will affect
QUICKDRIVE belt durability. Always maintain proper track tension.
BRAKES
HYDRAULIC BRAKE INSPECTION
Inspect the brake lever reserve before each use of the snowmobile. See the
Brake Lever Travel section for procedure.
NOTICE
NOTICE
MAINTENANCE
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