Page 273 - Manual Oficina Polaris Sportsman 570 2014 a 2016

ENGINE / COOLING SYSTEM

11. Rotate the valve rapidly back and forth until the cut CYLINDER INSPECTION
sounds smooth. Lift the valve slightly off of the seat, 1. Remove all gasket material from the cylinder sealing
rotate 1/4 turn, and repeat the lapping process. Do surfaces.
this four to five times until the valve is fully seated,
and repeat process for the other valves. 2. Inspect the top of the cylinder for warpage using a
straight edge and feeler gauge.
12. Thoroughly clean cylinder head and valves.

CYLINDER REMOVAL
1. Remove and discard the head gasket.
3
2. Position the cam chain and guides vertically.
3. Tap cylinder 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 and connecting rod.
5. Remove the cylinder from the engine.

Cylinder Warpage:
.00098” (.025 mm)

3. Inspect cylinder for wear, scratches, or damage.
4. Inspect cylinder for taper and out of round with a
telescoping gauge or a dial bore gauge. Measure in
two different directions, front to back and side to
side, on three different levels (1/2" down from top, in
the middle, and 1/2” up from bottom).

6. Remove and discard cylinder base gasket.

9926803 R06 - 2014-2016 Sportsman 325 / ETX / 450 HO / 570 Service Manual 3.151
© Copyright Polaris Industries Inc.