2008 Yamaha WaveRunner FX SHO / FX Cruiser SHO Service Manual, Page 201Get this manual
Cylinder head
E 2Use 30 cutter to adjust the contact width of the top edge of the valve seat
b Previous contact width
3Use 60 cutter to adjust the contact width of the bottom edge of the valve seatb Previous contact width
4Use 45 cutter to adjust the contact width of the valve seat to specificationb Previous contact width Specified contact width