2008 Polaris ATV Predator 50, Sportsman Outlaw 90 Service Manual, Page 64Get this manual
ENGINETRANSMISSION Valve Sealing Test
12Clean and dry the combustion chamber areaPour small amount of clean solvent into each port and check for leakage around each valveThe valve seats should hold fluid with no seepage for at least 15 seconds
Cam Chain Tensioner Blade
To remove the tensioner blade (C), remove PVT cover and drive clutch (refer to PVT Section)NOTE: Tensioner blade removal is only required for service of the blade2Remove bolt (C) securing tensioner blade to crankcase1
Cylinder Removal
Follow engine disassembly procedures to remove cylinder head1Remove the two mm cylinder base bolts (A)The hose guide is attached to the lower base boltInspect blade for cracks, wear, or damage