Polaris TRAIL BOSS 325 2001, Manual

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MAINTENANCE
2.21
VALVE CLEARANCE
Inspect and adjust valve clearance while the engine is cold
and the piston positioned at Top Dead Center (TDC) on
compression stroke.
1. Remove the seat.
2. Remove body panels and fuel tank as necessary to
gain access to valve cover.
3. Remove the spark plug high tension lead and remove
the spark plug.
CAUTION: Place a clean shop towel
into the spark plug cavity to prevent dirt from entering.
4. Remove plastic valve plugs.
5. Remove timing inspection plug from recoil housing.
CAUTION: Failure to position the crankshaft at TDC on
compression stroke will result in improper valve adjust-
ment.
6. Rotate engine slowly with recoil rope, watching the
intake valve(s) open and close.
NOTE: Observe the intake valve closing and then start to
open, continue to rotate until the “T” aligns with pointer. The
camshaft lobes should be pointing downward.
7. Verify accurate TDC positioning by observing the “T”
mark aligned with the pointer in the timing inspection
hole. In this position there should be clearance on all
valves.
325 Valve Plugs