Engine/Transmission; Specifications; Special Tools; Camshaft And Cylinder Head - Arctic Cat 450 XC 2011 Service Manual

Engine/Transmission

This section has been organized into sub-sections which
show a progression for the complete servicing of the Arc-
tic Cat ATV 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: Use new gaskets, lock nuts, and seals and
lubricate all internal components when servicing the
engine/transmission.

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.
Description
Crankcase Separator/Crankshaft Remover
Magneto Rotor Remover Set
Oil Filter Wrench
Piston Pin Puller
Spanner Wrench
Surface Plate
V Blocks
 NOTE: Special tools are available from the Arctic
Cat Service Department.
Piston Skirt/Cylinder Clearance
Piston Diameter 8 mm from Skirt End
Piston Ring Free End Gap (min)
Bore x Stroke
Cylinder Trueness
Piston Ring End Gap - Installed
Piston Ring to Groove Clearance (max) (1st/2nd) 0.06 mm
Piston Ring Groove Width
Piston Ring Thickness
Piston Pin Bore
Piston Pin
Valve Face Diameter
Valve/Tappet Clearance (cold engine)
Valve Guide/Stem Clearance (max)
p/n
0444-152
Valve Guide Inside Diameter
0444-254
Valve Stem Outside Diameter
0644-389
0644-328
Valve Stem Runout
0444-251
Valve Margin (min)
0644-016
Valve Face/Seat Width (min)
0644-535
Valve Seat Angle
Valve Face Radial Runout
Valve Spring Free Length
Valve Spring Tension @ 32.5 mm
Cam Lobe Height (min)
Camshaft Journal/Cylinder Head Clearance(max) 0.074 mm
Camshaft Journal Holder
Inside Diameter
Camshaft Journal Outside
Diameter
Camshaft Runout
Rocker Arm Inside Diameter
Rocker Arm Shaft Outside Diameter
Cylinder Head/Cover Distortion
Connecting Rod (small end)
Connecting Rod (big end side-to-side)
Connecting Rod (big end width)
Connecting Rod (small end deflection)
Crankshaft (web-to-web)
Crankshaft Runout
Specifications subject to change without notice.
Manual
Table of Contents

Specifications

CYLINDER, PISTON, AND RINGS
(1st)
(2nd)
(max) 0.01 mm
(min) 0.15 mm
(1st)
(2nd)
(oil)
(1st/2nd) 1.97-1.99 mm
(max) 20.20 mm
(min) 19.994 mm
VALVES AND GUIDES
(intake)
(exhaust)
(intake)
(exhaust)
(intake)
(exhaust)
(intake)
(exhaust)
(max) 0.10 mm
(intake) 1.1 mm
(intake) 0.99 mm
(intake/exhaust) 45°-75°
(max) 0.15 mm
(min) 44.73 mm
(outer)

CAMSHAFT AND CYLINDER HEAD

(intake)
(exhaust)
(right & center)
(left)
(center)
(left)
(right)
(max) 0.03 mm
(max) 0.05 mm
CRANKSHAFT
(max) 20.021 mm
(max) 0.7 mm
(max)
(max) 0.03 mm
0.025-0.055 mm
88.96-89.01 mm
8.0 mm
8.3 mm
89.0 x 71.2 mm
1.01-1.03 mm
1.21-1.23 mm
2.01-2.03 mm
35.0 mm
30.5 mm
0.10 mm
0.17 mm
0.1 mm
0.3 mm
5.000-5.012 mm
4.975-4.990 mm
4.955-4.970 mm
17.23 kg (37.98 lb)
34.71 mm
34.48 mm
22.01-22.04 mm
17.51-17.54 mm
21.959-21.980 mm
17.466-17.480 mm
21.966- 21.980 mm
10.00-10.15 mm
9.972-9.987 mm
21.95-22.00 mm
0.15 mm
60.9 mm
21