3-2
Engine/Transmission
This section has been organized into sub-sections
which show a progression for the complete servicing
of the Arctic Cat ATV engine/transmission.
To service the center crankcase halves, the
engine/transmission must be removed from the frame.
To service top-side, left-side, and right-side compo-
nents, the engine/transmission does not have to be
removed from the frame.
NOTE: Arctic Cat recommends the use of new
gaskets, lock nuts, and seals and lubricating all
internal components when servicing the engine/
transmission.
NOTE: Some photographs and illustrations used
in this section are used for clarity purposes only
and are not designed to depict actual conditions.
NOTE: Critical torque specifications are located
in Section 1.
SPECIAL TOOLS
A number of special tools must be available to the techni-
cian when performing service procedures in this section.
Refer to the current Special Tools Catalog for the
appropriate tool description.
NOTE: Special tools are available from the Arctic
Cat Service Parts Department.
Specifications*
* Specifications subject to change without notice.
Description
p/n
Crankcase Separator/Crankshaft Remover
0444-152
Magneto Rotor Remover
0444-206
Oil Filter Wrench
0644-389
Piston Pin Puller
0644-328
Spanner Wrench
0444-251
Surface Plate
0644-016
V Blocks
0644-535
VALVES AND GUIDES
Valve Face Diameter
(intake)
(exhaust)
30.6 mm
27.0 mm
Valve/Tappet Clearance
(intake)
(cold engine)
(exhaust)
0.076-0.127 mm
0.152-0.203 mm
Valve Guide/Stem Clearance (max)
(intake)
(exhaust)
0.04 mm
0.06 mm
Valve Guide/Valve Stem Deflection
(max)
(wobble method)
0.35 mm
Valve Guide Inside Diameter
5.000-5.015 mm
Valve Stem Outside Diameter
(intake)
(exhaust)
4.975-4.990 mm
4.955-4.970 mm
Valve Stem Runout
(max) 0.05 mm
Valve Head Thickness
(intake)
(exhaust)
2.03 mm
2.28 mm
Valve Face/Seat Width (min)
(intake)
(exhaust)
2.25 mm
2.55 mm
Valve Seat Angle
(intake/exhaust) 45°
Valve Face Radial Runout
(max) 0.03 mm
Valve Spring Free Length
(min) 42.8 mm
Valve Spring Tension @ 32.5 mm
(outer)
18.6-21.4 kg
(41-47 lb)
CAMSHAFT AND CYLINDER HEAD
Cam Lobe Height (min)
(intake/exhaust) 33.53 mm
Camshaft Journal Oil Clearance
(max) 0.081 mm
Camshaft Journal Holder
(right & center)
Inside Diameter
(left)
22.01-22.04 mm
17.51-17.54 mm
Camshaft Journal Outside
(right & center)
Diameter
(left)
21.959-21.980 mm
17.466-17.480 mm
Camshaft Runout
(max) 0.03 mm
Rocker Arm Inside Diameter
12.000-12.018 mm
Rocker Arm Shaft Outside Diamter
11.975-11.987 mm
Cylinder Head Distortion
(max) 0.05 mm
Cylinder Head Cover Distortion
(max) 0.05 mm
CYLINDER, PISTON, AND RINGS
Piston Skirt/Cylinder Clearance
0.060-0.073 mm
Piston Diameter 15 mm from Skirt End
80.98-81.00 mm
Piston Ring Free End Gap (min)
(1st)
(2nd)
8.0 mm
8.3 mm
Bore x Stroke
81.0 x 71.2 mm
Cylinder Trueness
(max) 0.01 mm
Piston Ring End Gap - Installed
0.15-0.30 mm
Piston Ring to Groove Clearance (max) (1st/2nd) 0.06 mm
Piston Ring Groove Width
(1st)
(2nd)
(oil)
1.01-1.03 mm
1.21-1.23 mm
2.01-2.03 mm
Piston Ring Thickness
(1st)
(2nd)
0.97-0.99 mm
1.17-1.19 mm
Piston Pin Bore
(max) 20.008 mm
Piston Pin
(min) 19.994 mm
CRANKSHAFT
Connecting Rod (small end)
(max) 20.021 mm
Connecting Rod (big end side-to-side)
0.10-0.55 mm
Connecting Rod (big end width)
21.95-22.00 mm
Connecting Rod (small end deflection)
(max)
0.3 mm
Crankshaft (web-to-web)
60.8-60.9 mm
Crankshaft Runout
(max) 0.03 mm
Next
Section
Table of Contents
Manual
Table of Contents
FOR ARCTIC CAT ATV DISCOUNT PARTS CALL 606-678-9623 OR 606-561-4983
www.mymowerparts.com