Valve/Tappet Clearance; Feeler Gauge Procedure; Checking And Cleaning Drain - Arctic Cat 450 XC 2011 Service Manual

CAUTION
Failure to properly seat and align the filter element may
cause severe engine damage.
9. Install the air filter housing cover and secure with the
locking tabs.
10. Install the air filter housing assembly into the mount-
ing bracket and secure with two reinstallable rivets.
11. Install the inlet pipe onto the air box; then connect to
the air filter assembly making sure the boots are fully
engaged. Tighten the clamps securely.
CAUTION
Failure to fully engage the inlet boots to the indicator
marks could result in ingestion of dirt and severe
engine damage.

CHECKING AND CLEANING DRAIN

1. Inspect the drain on the filter housing cover and
clean out any dirt or debris.
8
2. Replace any drain that is cracked or shows any signs
of hardening or deterioration.
3. Wipe any accumulation of oil or gas from the filter
housing and drain.

Valve/Tappet Clearance

To check and adjust valve/tappet clearance, use the fol-
lowing procedure.
NOTE: The seat, left-side and right-side engine
covers, and gas tank must be removed for this pro-
KC449
cedure.
1. Remove the timing inspection plug and spark plug;
then remove the tappet covers (for more detailed
information, see Engine/Transmission - Servicing
Top-Side Components).
2. Rotate the crankshaft to the TDC position on the
compression stroke.
NOTE: At this point, the rocker arms and adjuster
screws must not have pressure on them.
KC445A

Feeler Gauge Procedure

Using a feeler gauge, check each valve/tappet clearance.
If clearance is not within specifications, loosen the jam
nut and rotate the tappet adjuster screw until the clear-
ance is within specifications. Tighten each jam nut
securely after completing the adjustment.
The feeler gauge must be positioned at the same angle
as the valve and valve adjuster for an accurate measure-
ment of clearance. Failure to measure the valve clear-
ance accurately could cause valve component damage.
Intake
Exhaust
KC397B
Manual
Table of Contents
CAUTION
VALVE/TAPPET CLEARANCE
0.076-0.127 mm (0.003-0.005 in.)
0.152-0.203 mm (0.006-0.008 in.)
CF005