Arctic Cat DVX 400 2004 Service Manual page 46

4. After installing the guide, use the standard valve
guide reamer to remove all burrs and tight areas that
may remain in each valve guide.
Valve Seat/Guide Servicing Flow
Chart
Grinding Valve Seats
NOTE: If the valve seat is beyond servicing, the
cylinder head must be replaced.
1. Insert an exhaust valve seat pilot shaft into an
exhaust valve guide. Slide an exhaust valve seat
grinding tool onto the pilot shaft; then using light
pressure on a driver handle and a deep socket, grind
the exhaust valve seat until within specifications.
NOTE: Repeat procedure on the remaining
exhaust valve.
CC143D
2. Insert an intake valve seat pilot shaft into one of the
intake valve guides. Slide the intake valve seat grind-
ing tool onto the pilot shaft; then using light pressure
on a driver handle and a deep socket, grind the intake
valve seat until within specifications.
CC138D
NOTE: Repeat procedure on the remaining intake
valve.
Lapping Valves
NOTE: Do not grind the valves. If a valve is dam-
aged, it must be replaced.
1. Remove all carbon from the valves.
2. Lubricate each valve stem with light oil; then apply a
small amount of valve lapping compound to the
entire seating face of each valve.
3. Attach the suction cup of a valve lapping tool to the
head of the valve.
ATV-0107
CC139D
CC140D
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