2003 Arctic Cat ATVs from 250cc to 500cc Service Manual, Page 325Get this manual
2Using the Standard Valve Guide Reamer (pin 0444-017), remove any burrs or tight areas from the valve gUide journals Valve SeatGuide Servicing Flovv
Purpose:
Make seating area smooth and round
Measure Seating Area Outside Diameter
Tool: Purpose: Vernier Calipers Check seat outside diameter against specification
Purpose: Increase outside
diameter of seat areatospeGification
Tool: Purpose:
15" Cutter
Reduce outside diameter of seat area to specification
3To install valve guide, use valve gUide installer and gently drive valve gUide with retaining clip into the bore from the valve spring side until the retaining clip just contacts the cylinder headTool: Purpose:
Measure Seat Width
45" Cutter
Increasewidlhof seat area beyond specification to increase outside diameter