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ENGINE / COOLING
3
9924096 - 2013 RANGER RZR XP 900 / RZR XP 4 900 Service Manual
© Copyright 2012 Polaris Sales Inc.
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.
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 valve(s).
12. Thoroughly clean cylinder head and valves.
Valve Seat Width:
Intake: 0.039" (1.00 mm)
Service Limit: 0.055" (1.4 mm)
Exhaust: 0.059” (1.50 mm)
Service Limit: 0.075" (1.9 mm)
EXHAUST
Seat Width
.059” (1.50 mm)
60°
45°
30°
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