1987-1997 Yamaha Big Bear 350 4x4 service manual, Page 84Get this manual
Valve Seat Cutter Set Use 45 cutter
Desired Result To achieve uniform valve seat width of 1.0 mm (0.039 in)
Valve Seat Cutter Set Use 20 cutter, first 45 cutter
Valve Seat Cutter Set Use 45 cutter
Desired Result To achieve uniform valve seat width of 1.0 mm (0.039 in)
Valve Seat Cutter Set Use 20 cutter, first 45 cutter