Cylinder Removal; Cylinder Inspection - Polaris 2014 Sportsman 570 EF Service Manual

Intake Seat Cutter Diameter:
1.567 in. (39.80 mm)
Exhaust Seat Cutter Diameter:
1.364 in. (34.65 mm)
8. Clean all filings from the area with hot soapy water.
Rinse and dry with compressed air.
9. Lubricate valve guides with clean engine oil and
apply oil or water based lapping compound to the
face of the valve.
NOTE: Lapping is not required if an interference
angle reconditioning method is used.
10. Insert the valve into its respective guide and lap
using a lapping tool or a section of fuel line
connected to the valve stem.
9924871 R03 - 2014 Polaris Sportsman® 570 EFI Service Manual
11. Rotate the valve rapidly back and forth until the cut
sounds smooth. Lift the valve slightly off of the seat,
rotate 1/4 turn, and repeat the lapping process. Do
this four to five times until the valve is fully seated,
and repeat process for the other valves.
12. Thoroughly clean cylinder head and valves.

Cylinder Removal

1. Remove and discard the head gasket (1).
2. Position the cam chain and guides vertically.
3. Tap cylinder (2) lightly with a plastic hammer in the
reinforced areas only until loose.
4. Rock cylinder forward and backward and lift it from
the crankcase, supporting piston (4) and connecting
rod.
5. Remove the cylinder from the engine.
6. Remove and discard cylinder base gasket (3).

Cylinder Inspection

1. Remove all gasket material from the cylinder sealing
surfaces.
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