3.8
Maintenance
9923396 - 2007-2012 EDGE/Widetrak LX Service Manual
©2011 Polaris Sales Inc.
ENGINE MAINTENANCE
Exhaust Valve Cleaning
The exhaust valve guillotines must be cleaned to ensure
maximum engine performance and throttle response.
1. Remove the two fasteners that secure the valve
assembly to the cylinder, but not the two screws that
secure the cover to the EV base.
2. Carefully extract the guillotine out of the cylinder.
Discard the gasket.
3. Using a clean rag or shop towel, remove the oil
residue from the cylinder, guillotine, and EV base.
4. Inspect the guillotine for signs of damage. Replace
guillotine if damage is found, and inspect the cylinder
and piston for damage.
5. Clean the guillotine with brake cleaner and a piece of
fine steel wool. Clean only to remove hardened
carbon deposits.
6. Once clean, rinse blade with mild detergent and
water. Dry completely.
7. Install a new gasket, then reinstall the EV assembly.
Apply Loctite 242 to the fastener threads, then torque
to specification.
NOTE: To obtain maximum exhaust valve
performance, Polaris recommends using Polaris VES
Gold Synthetic Two-Stroke engine oil.
Never mix different brands of engine oil.
Exhaust Valve Housing Fasteners
12 Ft.Lbs. (16 Nm) - Apply Loctite 242
GASKET
EV ASSEMBLY
FASTENERS
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