2006 Arctic Cat DVX 400 Service Manual, Page 47Get this manual
Servicing Top-Side Components NOTE: Whenever part is worn excessively, cracked, or damaged in any way, replacement is necessary
VALVE ASSEMBLY
When servicing valve assembly, inspect valve seats, valve stems, valve faces, and valve stem ends for pits, burn marks, or other signs of abnormal wearNOTE: Whenever valve is out of tolerance, it must be replaced
CleaningInspecting Valve Cover
NOTE: Always note the position of each removed partOrganize the parts in relative groups (i.eexhaust or intake) so they can be installed in their original positionsSP195
1Remove the intake hose; then remove the thermostat housing (1) and thermostat (2)