Valve/Tappet Clearance (Valve Adjuster Procedure); Valve/Tappet Clearance (650 V-Twin - Feeler Gauge Procedure) - Arctic Cat 400 Service Manual

Valve/Tappet Clearance
(Valve Adjuster Procedure)
NOTE: For the 650 V-Twin, see Valve/Tappet
Clearance (650 V-Twin) in this section.
To check and adjust valve/tappet clearance, use the
following procedure.
NOTE: On the 400 VP, the seat assembly, side
panels, and gas tank must be removed for this pro-
cedure.
NOTE: On the TBX/500/650 H1, the seat, storage
compartment cover assembly, compartment box,
air filter/filter housing, and left-side/right-side
splash panels must be removed for this procedure.
1. Remove the timing inspection plug; then
remove the tappet covers (for more detailed
information, see Section 3 - 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.
NOTE: Use Valve Clearance Adjuster (p/n
0444-078) for this procedure.
3. Place the valve adjuster onto the jam nut secur-
ing the tappet adjuster screw; then rotate the
valve adjuster dial clockwise until the end is
seated in the tappet adjuster screw.
4. While holding the valve adjuster dial in place,
use the valve adjuster handle and loosen the jam
nut; then rotate the tappet adjuster screw clock-
wise until friction is felt.
5. Align the valve adjuster handle with one of the
marks on the valve adjuster dial.
6. While holding the valve adjuster handle in
place, rotate the valve adjuster dial counter-
clockwise until proper valve/tappet clearance is
attained.
NOTE: Refer to the appropriate specifications in
Feeler Gauge Procedure sub-section for the proper
valve/tappet clearance.
NOTE: Rotating the valve adjuster dial counter-
clockwise will open the valve/tappet clearance by
0.05 mm (0.002 in.) per mark.
Back
2-10
Back to TOC
7. While holding the adjuster dial at the proper
clearance setting, tighten the jam nut securely
with the valve adjuster handle.
8. Place the two tappet covers with O-rings into
position; then tighten the covers securely.
9. Install the spark plug; then install the timing
inspection plug.
Valve/Tappet
Clearance
(650 V-Twin - Feeler Gauge
Procedure)
To check and adjust valve/tappet clearance, use the
following procedure.
NOTE: The seat, air filter housing, front fenders,
front inner covers, and side panels must be
removed for this procedure.
1. Remove the cap screws securing the recoil
starter; then remove the recoil starter assembly.
2. Remove the timing inspection plug; then
remove the four tappet covers (for more detailed
information, see Section 3 - Servicing Top-Side
Components).
3. Rotate the crankshaft counterclockwise to the
TDC position on the compression stroke indi-
cated by the TF mark (A) on the flywheel. TF is
top dead center front.
NOTE: At this point, the rocker arms and
adjuster screws on the front cylinder must not
have pressure on them.
Back to Section TOC
CF005
Next