2008 Polaris ATV Predator 50, Sportsman Outlaw 90 Service Manual, Page 50Get this manual
ENGINETRANSMISSION Engine Service Data
Cylinder HeadValvetrain Rocker Arm Rocker Arm Shaft Rocker arm ID Rocker arm ID Rocker arm shaft OD Rocker arm shaft OD (InEx) (InEx) (InEx) (InEx) In Camshaft Cam lobe height Ex Cylinder Head Valve Clearance (Lash) Surface warpage limit In Ex In Valve Seat Contacting width Ex Std Std Std Limit Std Limit In Valve Stem diameter Ex Limit In Valve Guide Inner Diameter Clearance (Standard) Valve Stem to Guide Clearance (Standard) Ex Limit In Ex Clearance Limit (In) Clearance Limit (Ex) Valve Spring Cam Chain Compression Pressure (Maximum reading with throttle wide open) Std Free Length Squareness Inner Outer Std Limit Std Limit Std Limit Std Limit Sportsman 90Outlaw 90 .3937.3944" (10.00-10.02 mm) .3976" (10.10 mm) .3926.3932" (9.979.99 mm) .3902" (9.91 mm) 1.047" (26.60 mm) 1.031" (26.20 mm) 1.039" (26.40 mm) 1.024" (26.00 mm) .0020" (.05 mm) .002" (.06 mm) .002" (.06 mm) .039" (1.0 mm) .063" (1.6 mm) .039" (1.0 mm) .063" (1.6 mm) .1958.1965" (4.984.99 mm) .1950.1956" (4.964.97 mm) .1930" (4.90 mm) .1968.1973" (5.05.01 mm) .1968.1973" (5.05.01 mm) .1980" (5.03 mm) .0004.0015" (.01.037 mm) .0012.0022" (.03.057 mm) .0031" (.08 mm) .0039" (.10 mm) 1.270" (31.75 mm) 1.365" (34.67 mm) 0.075" (1.9 mm) Install new as part of any crankshaft removal 135-175 psi (930-1205 kPa )