2010 Polaris Sportsman 850 Service Manual, Page 27Get this manual

2010 Polaris Sportsman 850 Service Manual, Page 27

MAINTENANCE 16Loosen the jam nut and turn the lash adjuster until the valve lash is correct17Set the intake and exhaust valve
inlbs(8-10 Nm) 19Turn the drive clutch counter-clockwise to rotate the cam sprocket 225 to the PTO (#2) Adjustment PositionPTO
(#2) Adjustment Position Compression and Leakdown Tests Timing Marks at PTO (#2) Adjustment Position NOTE: This engine does
NOT have decompression componentsCompression readings will vary in proportion to cranking speed during the testSmooth idle
generally indicates good compressionLow engine compression is rarely factor in running condition problems above idle speedAbnormally
high compression can be caused by worn or damaged exhaust cam lobesA cylinder leak-down test is the best indication of engine
conditionFollow tester manufacturer's instructions to perform cylinder leak-down test(Never use high pressure leakage testers
as crankshaft seals may dislodge and leak) 20Set the PTO cylinder valve lash by placing the feeler gauge blade between the