2006 Arctic Cat ATVs 400/400TBX/400TRV/500/500TBX/500TRV/650H1/650 V-Twin Service Manual, Page 198Get this manual
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Valve SeatGuide Servicing Flow Chart
NOTE: If the valve seat is beyond servicing, the cylinder head must be replacedCC143D
4 After installing the guide, use the standard valve guide