2009 Polaris Sportsman 850 XP EFI EPS Service Manual, Page 123Get this manual

2009 Polaris Sportsman 850 XP EFI EPS Service Manual, Page 123

ENGINE Combustion Chamber 1Clean all accumulated carbon deposits from combustion chamber and valve seat area4Drive or press
the combustion chamber sideDrive or press old valve guides out of cylinder headExhaust Valve Guide Height: 6.757.25 mm Replacement
of valve guides requires an oven, special equipment and experience to do the job correctlyIf you are unsure of your ability
to do the repair professionally it is best to sublet the labor to competent machinistValve seat reconditioning is required
when valve guides are replaced The cylinder head can be easily damaged if the procedure is done carelessly3Apply 90 weight
oil to outside of new valve guides5Ream or hone new valve guides to size to obtain specified stem-to-guide clearanceReam
from combustion chamber side of head Do not tilt the reamer while reaming the guideAlways rotate the reamer in clockwise