2008 Polaris Sportsman 500 EFI/X2/Touring/500 H.O. Service Manual, Page 84Get this manual
ENGINE 6Place cylinder head on cylinder head tableNOTE: Be sure cylinder head is still at 212o (100o C) before installing new guides11Apply cutting oil to valve seat and cutter
Valve Guide Installed Height Valve Guide Height: .689-.709" (17.5-18.0 mm) 7Place new guide in the valve guide installation tool and press guide in to proper depthCheck height of each guide above the cylinder head (A)NOTE: The guide can also be driven in to the proper depthInspect the guide closely for cracks or damage if driver is used12Place 46o cutter on the pilot and make light cut13Inspect the cut area of the seat If the contact area is less than 75 of the circumference of the seat, rotate the pilot 180o and make another light cut If the cutter now contacts the uncut portion of the seat, check the pilotLook for burrs, nicks, or runoutIf the pilot is bent it must be replaced If the contact area of the cutter is in the same place, the valve guide is distorted from improper installation and must be replacedBe sure the cylinder head is at the proper temperature and replace the guide If the contact area of the initial cut is greater than 75, continue to cut the seat until all pits are removed and new seat surface is evidentNOTE: Remove only the amount of material necessary to repair the seat surface