Page 266 - Manual Oficina Polaris Sportsman 570 2014 a 2016

ENGINE / COOLING SYSTEM

CAMSHAFT INSPECTION EXHAUST CAMSHAFT DECOMPRESSION
Inspect all main journals and cam lobes as described MECHANISM
below and compare to specifications. Replace camshafts
or cylinder head if worn beyond service limit or if any NOTE
surface is pitted or damaged. Removal of the decompression mechanism is not
1. Visually inspect each cam lobe for wear or damage. necessary unless replacement is required.
2. Measure the height of each cam lobe from the base 1. Thoroughly clean and inspect the decompression
circle to highest point on the lobe using a mechanism q located on the exhaust camshaft.
micrometer. Compare to specification.
2. Replace the decompression assembly if any
excessive wear or binding is evident.

NOTE
Replace camshafts if damaged or if any part is worn 3. Be sure the decompression mechanism functions
past the service limit. smoothly and easily returns under spring pressure to
the resting position against gravity.

MEASUREMENT
Camshaft Lobe Height:
Intake: 1.5704" ± 0.0038" (39.89 ± 0.097 mm)
Exhaust: 1.5405" ± 0.0038" (39.13 ± 0.097 mm)

3.144 9926803 R06 - 2014-2016 Sportsman 325 / ETX / 450 HO / 570 Service Manual
© Copyright Polaris Industries Inc.