2007 Arctic Cat Four-Stroke Factory Service Manual, Page 16Get this manual
Engine Specifications (120 cc)
Cam Lobe Height Crank Pin Diameter Crankshaft Runout (Max) Cylinder Bore Diameter (Max) Cylinder Head Distortion (Max) 30.20-30.56 mm (1.189-1.203 in 25.990-26.000 mm (1.0232-1.0236 in 0.100 mm (0.004 in 60.25 mm (2.372 in 0.03 mm (0.0012 in Valve FaceSeat Width Valve Spring Length (Max) 0.8-1.0 mm (0.032-0.039 in 31.0 mm (1.22 in
Valve StemGuide Clearance (Int) 0.080 mm (Max) (0.0032 in (Exh) 0.100 mm (0.0039 in
Piston Diameter 59.880-59.990 mm (14 mm up from skirt perpendicu- (2.3575-2.3618 in lar to pin) Piston SkirtCylinder Clearance 0.020-0.120 mm (0.0008-0.0047 in