2004 Bombardier DS650/DS650 Baja/DS650 Baja X Shop Manual, Page 107Get this manual
Subsection 08
Section 03 ENGINE (CYLINDER AND HEAD)
Valve Guide Removal
Remove: cylinder head (see CYLINDER HEAD above) valve spring (see VALVE SPRING above) valve (see VALVE above)NOTE: Clean valve guide area from contamination before removalHeat the valve guide area using heat gun for approximately 10 minutes to 100C (212F)
Installation
For installation, reverse the removal procedurePay attention to the following detailsClean the valve guide bore before reinstalling the valve guide into cylinder headInstall circlip no31 on the valve guide Use valve guide removerinstaller (PN 529 035 852) to install valve guide no322 3