Arctic Cat M 8000, Service Manual

Page: 8 / 210

7
Engine Specifications
4000
6000
8000
Crankshaft Runout/Repair
Specifications
Refer to the drawing; then find the letter indicating the
specification and refer to the chart below the illustration.
 NOTE: The proper location for checking crankshaft
runout is the very edge of the straight portion of the
shaft where the oil seal makes contact. From the illus-
tration, note that three check points are called out: at
either end, out on the taper as shown, and also on the
center bearing race. The crankshaft is still supported
on the outer bearings using V blocks.
728-144A

NOTE: Measure in from the shaft end the specified
amount when checking runout at points D and F. When
checking runout in the center, place indicator on center
of bearing as shown at point E. Maximum runout at
any of the three measuring points is ± 0.002”.
6000

NOTE: The crankshaft must be supported on the
inner bearings using V blocks.
0747-810
ITEM
Engine Model Number AX50L9
Displacement 499 cc
Bore x Stroke 71 x 63
Compression Ratio 6.38:1
Cooling System Liquid
Ignition Timing (Engine Warm) 13° @ 2000 RPM
0.040”
Spark Plug (NGK) BR9EYA
Spark Plug Gap 0.028-0.031”
Piston Skirt/Cylinder Clearance 0.0031-0.0041”
Piston Ring End Gap 0.008-0.016”
Cylinder Trueness Limit 0.004”
Piston Pin Diameter 0.8659-0.8661”
Piston Pin Bore Diameter 0.8661-0.8665”
Connecting Rod Small End Bore 1.0631-1.0634”
Connecting Rod Radial Play 0.0001-0.0008”
Crankshaft Runout (t.i.r.) 0.002”
Crankshaft End Play 0.002-0.004”
Reed Stopper Height 0.315”
ITEM
Engine Number 0962-011
Displacement 599 cc
Bore x Stroke 73.8 x 70 mm
Compression Ratio 6.62:1
Cooling System Liquid
Ignition Timing (Engine Warm) 16.5° @ 2000
RPM 0.072”
Spark Plug (NGK) BPR9ES
Spark Plug Gap 0.028-0.031”
Piston Skirt/Cylinder Clearance 0.0041-0.0053”
Piston Ring End Gap 0.012-0.0196”
Cylinder Trueness Limit 0.004”
Piston Pin Diameter 0.8659-0.8661”
Piston Pin Bore Diameter 0.8661-0.8665”
Connecting Rod Small End Bore 1.0631-1.0634”
Connecting Rod Radial Play 0.0001-0.0008”
Crankshaft Runout (t.i.r.) 0.002”
Crankshaft End Play 0.002-0.004”
Reed Stopper Height 0.512”
ITEM
Engine Model Number AB80L4
Displacement 794 cc
Bore x Stroke 85 x 70
Compression Ratio 6.62:1
Cooling System Liquid
Ignition Timing (Engine Warm) 16.5° @ 2000
RPM 0.072”
Spark Plug (NGK) BR9EYA
Spark Plug Gap 0.028-0.031”
Piston Skirt/Cylinder Clearance 0.0041-0.0053”
Piston Ring End Gap 0.012-0.0196”
Cylinder Trueness Limit 0.004”
Piston Pin Diameter 0.8659-0.8661”
Piston Pin Bore Diameter 0.8661-0.8665”
Connecting Rod Small End Bore 1.0631-1.0634”
Connecting Rod Radial Play 0.0001-0.0008”
Crankshaft Runout (t.i.r.) 0.002”
Crankshaft End Play 0.002-0.004”
Reed Stopper Height 0.512”
Model
A
± 0.006
B
± 0.006
C
± 0.015
G
Runout D
and F Point
± 0.002
4000 4.515” 2.618” 4.465” 1.062” D
0.196”
F
0.196”
8000 4.751” 2.519” 4.645” 1.181” D
0.196”
F
0.196”