2008 Arctic Cat ThunderCat ATV Service Manual, Page 26Get this manual
EngineTransmission This section has been organized into sub-sections which show progression for the complete servicing of the Arctic Cat ATV enginetransmissionTo service the center crankcase halves, the enginetransmission must be removed from the frameNOTE: Arctic Cat recommends the use of new gaskets, lock nuts, and seals and lubricating all internal components when servicing the engine transmissionNOTE: Some photographs and illustrations used in this section are used for clarity purposes only and are not designed to depict actual conditionsNOTE: Critical torque specifications are located in Section 1
VALVES AND GUIDES (cont)
Valve GuideValve Stem Deflection (wobble method) Valve Guide Inside Diameter Valve Stem Outside Diameter Valve Stem Runout Valve Head Thickness Valve Stem End Length Valve FaceSeat Width Valve Seat Angle Valve Face Radial Runout Valve Spring Free Length Valve Spring Tension 31.5 mm (1.24 in Cam Lobe Height (min) Camshaft Journal Holder Inside Diameter Camshaft Journal Outside Diameter Camshaft Runout Rocker Arm Inside Diameter Rocker Arm Shaft Outside Diameter Cylinder HeadCover Distortion Piston SkirtCylinder Clearance Piston Diameter 15 mm (0.6 in from Skirt End Piston Ring Free End Gap Bore Stroke Cylinder Trueness Piston Ring End GapInstalled Piston Ring to Groove Clearance (max) Piston Ring Groove Width (max) 0.35 mm (0.014 in 5.000-5.012 mm (0.1969-0.1973 in (intakeexhaust) 4.972-4.987 mm (0.1957-0.1963 in (max) 0.1 mm (0.0039 in (min) 2.3 mm (0.0906 in (min) 3.97 mm (0.156 in (intake) 2.25 mm (0.0886 in (exhaust) 2.60 mm (0.1024 in (intakeexhaust) 45 15'-45 30' (max) 0.2 mm (0.0079 in (min) 38.7 mm (1.524 in (outer) 19.0 kg (42 lb)