2003 Bombardier Outlander 400 Factory Service Manual, Page 131Get this manual
Subsection 09
Section 03 ENGINE (CYLINDER AND HEAD)
Inspection
Check valve spring for visible damagesIf so, replace valve springCheck valve spring for free length and straightnessReplace valves if not within specifications
Removal
Remove valve springPush valve stem then pull valves no36 (intake) and no37 (exhaust) out of valve guide no402 1
R400motr80A
R400motr82A
AValve spring length
1Intake valve 31 mm 2Exhaust valve 27 mm