2008-2010 Kawasaki KFX450R Factory Service Manual, Page 189Get this manual
5-28 ENGINE TOP END Valves
Valve Seat Inspection
Remove the valve (see Valve Removal)the valve [B] valve seating Check the seat [C]surface [A] between and valve outside Measure the seatdiameter [D] of the seating pattern on the valve
If the outside diameter is too large or too small, repair the seat(see Seat Repair)
Valve Seating Surface Outside Diameter Exhaust 30.4 30.6 mm (1.197 1.205 in Inlet
seating surface the valve seat Check thethe seat width [E]width ofportion where there is Measure of the no build-up carbon (white portion) of the valve seat with vernier caliperGood [F]
Valve Seating Surface Width Standard Exhaust 0.8 1.2 mm (0.03 0.047 in Inlet 0.5 1.0 mm (0.02 0.039 in
35.4 35.6 mm (1.39 1.40 in