Engine Specifications (120 Cc) - Arctic Cat 660 cc Service Manual

Cylinder Bore Diameter
Cylinder Head Distortion
Manifold Distortion
Piston Diameter
(3/4 up from skirt perpendicular to
pin)
Piston Skirt/Cylinder
Clearance
Piston Connecting Rod
Small End Bore
Piston Pin/Connecting Rod
Small End Clearance
Piston Pin Bore In Piston
Piston Pin
Piston Ring Groove/Ring
Clearance
Valve Guide Inside Diameter
Valve Head
(Thickness)
Valve Lash Clearance -
Cold (59°-77° F)
Valve Seat Width
Valve Stem
Diameter
Valve Stem/Guide
Clearance
Back
(Max) 68.020 mm
(2.6779 in.)
(Max) 0.030 mm
(0.001 in.)
(Max) 0.050 mm
(0.002 in.)
67.970-67.990 mm
(2.6760-2.6768 in.)
0.02-0.04 mm
(0.0008-0.0016 in.)
21.003-21.013 mm
(0.8269-0.8273 in.)
0.003-0.018 mm
(0.0001-0.0007 in.)
21.002-21.008 mm
0.8268-0.8271 in.)
(Dia) 20.995-21.000 mm
(0.8266-0.8268 in.)
(1st) 0.04-0.08 mm
(0.0012-0.0031 in.)
(2nd) 0.03-0.07 mm
(0.0012-0.0028 in.)
(Oil) 0.06-0.15 mm
(0.0024-0.0059 in.)
5.500-5.512 mm
(0.2165-0.2170 in.)
(Int) 1.0 mm
(0.039 in.)
(Exh) 1.15 mm
(0.045 in.)
(Int) 0.18-0.23 mm
(0.007-0.009 in.)
(Exh) 0.22-0.27 mm
(0.008-0.010 in.)
(Int) 1.80-2.20 mm
(0.0709-0.0866 in.)
(Exh) 1.65-2.05 mm
(0.0650-0.0807 in.)
(Int) 5.465-5.480 mm
(0.2152-0.2157 in.)
(Exh) 5.440-5.455 mm
(0.2142-0.2148 in.)
(Int) 0.020-0.047 mm
(0.0008-0.0019 in.)
(Exh) 0.045-0.072 mm
(0.0018-0.0029 in.)
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Engine Specifications
(120 cc)
Cam Lobe Height
Crank Pin Diameter
Crankshaft Runout
Cylinder Bore Diameter
Cylinder Head Distortion
Piston Diameter
(14 mm up from skirt
perpendicular to pin)
Piston Skirt/Cylinder
Clearance
Piston Ring End Gap (1st & 2nd) 0.20-0.70 mm
Connecting Rod Big End
Side Clearance
Connecting Rod Big End
Inside Diameter
Crank Pin/Connecting
Rod Clearance
Connecting Rod Small End Bore
Piston Pin/Connecting Rod
Small End Clearance
Piston Pin Bore In Piston
Piston Pin Diameter
Piston Ring Thickness (1st & 2nd) 1.47-1.49 mm
Piston Ring Groove (1st & 2nd)
Width
Piston Ring Groove/Ring
Clearance (1st & 2nd) 0.030-0.010 mm
Valve Guide Hole Diameter
Valve Guide Inside Diameter
Valve Stem Runout
Valve Face/Seat Width
Valve Spring Length
Valve Stem/Guide Clearance
(Max)
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30.20-30.56 mm
(1.189-1.203 in.)
25.990-26.000 mm
(1.0232-1.0236 in.)
(Max) 0.100 mm
(0.004 in.)
(Max) 60.25 mm
(2.372 in.)
(Max) 0.03 mm
(0.0012 in.)
59.880-59.990 mm
(2.3575-2.3618 in.)
0.020-0.120 mm
(0.0008-0.0047 in.)
(0.0079-0.0280 in.)
0.20-1.20 mm
(0.0079-0.0472 in.)
26.015-26.025 mm
(1.0242-1.0246 in.)
0.015-0.070 mm
(0.0006-0.0028 in.)
15.006-15.030 mm
(0.5908-0.5917 in.)
0.006-0.050 mm
(0.0002-0.0020 in.)
15.006-15.030 mm
(0.5908-0.5917 in.)
14.980-14.995 mm
(0.5898-0.5904 in.)
(0.058-0.059 in.)
1.52-1.54 mm
(0.060-0.061 in.)
(Oil) 2.51-2.53 mm
(0.098-0.099 in.)
(0.0012-0.0039 in.)
11.200-11.218 mm
(0.4409-0.4416 in.)
5.500-5.512 mm
(0.2165-0.2170 in.)
(Max) 0.05 mm
(0.002 in.)
0.8-1.0 mm
(0.032-0.039 in.)
(Max) 31.0 mm
(1.22 in.)
(Int) 0.080 mm
(0.0031 in.)
(Exh) 0.100 mm
(0.0039 in.)
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