3-2
Engine/Transmission
This section has been organized into sub-sections which
show a progression for the complete servicing of the Arc-
tic Cat ROV engine/transmission.
To service the center crankcase halves, the engine/trans-
mission must be removed from the frame. To service
top-side, left-side, and right-side components, 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 appro-
priate tool description.
NOTE: Special tools are available from the Arctic
Cat Service Parts Department.
Specifications
Specifications subject to change without notice.
Description
p/n
Seal Protector Tool
0444-252
Crankcase Separator/Crankshaft Remover
0444-152
Magneto Rotor Remover Set
0444-254
Piston Pin Puller
0644-328
Secondary Drive Gear Holder
0444-253
Spanner Wrench
0544-005
Surface Plate
0644-016
V Blocks
0644-535
VALVES AND GUIDES
Valve Face Diameter
(intake)
(exhaust)
31.6 mm
27.9 mm
Valve/Tappet Clearance
(intake)
(cold engine)
(exhaust)
0.1016 mm
0.1524 mm
Valve Guide/Stem Clearance (intake/exhaust) 0.013 mm
Valve Guide/Valve Stem Deflection
(max)
(wobble method)
0.35 mm
Valve Guide Inside Diameter
5.000-5.012 mm
Valve Stem Outside Diameter (intake/exhaust) 4.972-4.987 mm
Valve Stem Runout
(max) 0.1 mm
Valve Head Thickness
(min) 2.3 mm
Valve Stem End Length (mm)
3.97 mm
Valve Face/Seat Width
(intake)
(exhaust)
2.25 mm
2.60 mm
Valve Seat Angle
(intake/exhaust) 45°
Valve Face Radial Runout
(max) 0.2 mm
Valve Spring Free Length
(min) 38.7 mm
Valve Spring Tension @ 31.5 mm
(outer) 19.0 kg (42 lb)
CAMSHAFT AND CYLINDER HEAD
Cam Lobe Height (min)
(intake/exhaust) 33.53 mm
Camshaft Journal Oil Clearance
(max) 0.04 mm
Camshaft Runout
(max) 0.05 mm
Rocker Arm Inside Diameter
(max) 12.018 mm
Rocker Arm Shaft Outside Diameter
(min) 11.97 mm
Cylinder Head/Cover Distortion
(max) 0.05 mm
CYLINDER, PISTON, AND RINGS
Piston Skirt/Cylinder Clearance
0.045 mm
Piston Diameter 15 mm from Skirt End
101.930-101.949 mm
Piston Ring Free End Gap
(1st/2nd) 12.5 mm
Bore x Stroke
102 x 85 mm
Cylinder Trueness
(max) 0.01 mm
Piston Ring End Gap - Installed
0.36 mm
Piston Ring to Groove Clearance
(max)
(1st/2nd)
0.03 mm
Piston Ring Groove Width
(1st/2nd)
(oil)
1.202-1.204 mm
2.01-2.03 mm
Piston Ring Thickness
(1st/2nd) 1.970-1.990 mm
Piston Pin Bore
(max) 23.0 mm
Piston Pin Outside Diameter
(min) 22.99 mm
CRANKSHAFT
Connecting Rod (small end inside
(max)
diameter)
23.021 mm
Connecting Rod (big end side-to-side)
0.6 mm
Connecting Rod @ 150 mm
(max)
(small end deflection)
0.3 mm
Crankshaft (web-to-web)
71 mm
Crankshaft Runout
(max) 0.03 mm
Manual
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