2007-2010 Kawasaki Ultra 250X/260X/260LX PWC Factory Service Manual, Page 227Get this manual
ENGINE TOP END 6-29 Valves
Valve Seat Inspection
Remove the valve (see Valve Removal) Check the valve seating surface [A] between the valve [8] and valve seat [C]OMeasure the outside diameter [0] of the seating pattern on the valve seatIf the outside diameter is too large or too smallrepair the seat (see Valve Seat Repair)Valve Seating Surface Outside Diameter Standard: Exhaust Inlet 27.627.8 mm (1.0871.094 in 32.632.8 mm (1.2831.291 in
OMeasure the seat width [EJ of the portion where there is no build-up carbon (white portion) of the valve seat with vernier caliperGood [F] If the width is too wide [G], too narrow [H] or uneven [J], repair the seat (see Valve Seat Repair) Valve Seating Surface Width Standard: Exhaust Inlet 0.81.2 mm (0.030.047 in 0.51.0 mm (0.020.039 in