2009 Polaris Scrambler 500 4x4 2x4 factory service manual, Page 75Get this manual

2009 Polaris Scrambler 500 4x4 2x4 factory service manual, Page 75

ENGINE S If the contact area of the cutter is in the same place, the valve guide is distorted from improper installation
the middle of the valve face or slightly above, and must be the proper widthS If the indicated seat contact is at the top
edge of the valve face and contacts the margin area(B) it is too high on the valve faceUse the 30 cutter to lower the valve
seatS If too low use the 60 or 75 cutter to raise the seatWhen contact area is centered on the valve face, measure seat widthS
If the seat is too wide or uneven, use both top and bottom cutters to narrow the seatS If the seat is too narrow, widen using
the 45 cutter and re-check contact point on the valve face and seat width after each cut NOTE: When using an interference
angle, the seat contact point on the valve will be very narrow, and is normal conditionLook for an even and continuous contact
point on the black marker, all the way around the valve face14Clean all filings from the area with hot soapy water, rinse,
and dry with compressed air15Lubricate the valve guides with clean engine oil, and apply oil or water based lapping compound