Arctic Cat 650 Twin2004, Service Manual

Page: 46 / 210

3-17
3

NOTE: For disassembling and servicing, refer to
Servicing Center Crankcase Components, this
section.
Table of Contents
(Servicing Components)

NOTE: Critical engine/transmission specifica-
tions are located at the beginning of this section.
Servicing Top-Side Components .......................... 3-17
Valve Assembly ................................................. 3-17
Piston Assembly ................................................ 3-21
Cylinder/Cylinder Head Assembly ...................... 3-23
Servicing Left-Side Components ......................... 3-26
Recoil Starter ..................................................... 3-26
Servicing Right-Side Components ....................... 3-26
Driven Pulley Assembly ...................................... 3-26
Drive Clutch Assembly ........................................ 3-28
Servicing Center Crankcase Components ........... 3-31
Crankshaft Assembly ......................................... 3-31
Disassembling Output Drive Bevel
Gear Assembly.................................................. 3-32
Disassembling Output Driven Bevel
Gear Assembly.................................................. 3-33
Servicing Top-Side
Components

NOTE: Whenever a part is worn excessively,
cracked, or damaged in any way, replacement is
necessary.
VALVE ASSEMBLY
When servicing valve assembly, inspect valve seats,
valve stems, valve faces, and valve stem ends for pits,
burn marks, or other signs of abnormal wear.

NOTE: Whenever a valve is out of tolerance, it
must be replaced.
Cleaning/Inspecting Valve Cover

NOTE: If the valve cover cannot be trued, the cyl-
inder head assembly must be replaced.
1. Wash the valve cover in parts-cleaning solvent.
2. Place the valve cover on the Surface Plate (p/n
0644-016) covered with #400 grit wet-or-dry
sandpaper. Using light pressure, move the valve
cover in a figure eight motion. Inspect the sealing
surface for any indication of high spots. A high
spot can be noted by a bright metallic finish.
Correct any high spots before assembly by
continuing to move the valve cover in a figure
eight motion until a uniform bright metallic finish
is attained.
CC130D
Removing Valves

NOTE: Keep all valves and valve components as
a set. Note the original location of each valve set
for use during installation. Return each valve set
to its original location during installation.
1. Using a valve spring compressor, compress the
valve springs and remove the valve cotters.
Account for an upper spring retainer.
CC132D
! CAUTION
Do not remove an excessive amount of the
sealing surface or damage to the camshaft will
result. Always check camshaft clearance when
resurfacing the valve cover.
! CAUTION
Water or parts-cleaning solvent must be used in
conjunction with the wet-or-dry sandpaper or
damage to the sealing surface may result.