2007-2010 Kawasaki Ultra 250X/260X/260LX PWC Factory Service Manual, Page 230Get this manual
6-32 ENGINE TOP END Valves
If the seat width is too wide, make the 60 or 55 [A] grind described belowIf the seat width is within the specified rangelap the valve to the seat as described below Grind the seat at 60 or 55 angle until the seat width is within the specified range OTo make the 60 or 55 grindfit 60 or 55 cutter into the holder, and slide it into the valve guideOTurn the holder, while pressing down lightlyOAfter making the 60 or 55 grind, return to the seat width measurement step aboveCorrect Width [8]
OE15 01 23S 1
Lap the valve to the seat, once the seat width and 0.0 are within the ranges specified aboveOPut little coarse grinding compound on the face of the valve in number of places around the valve headOSpin the valve against the seat until the grinding compound produces smoothmatched surface on both the seat and the valveORepeat the process with fine grinding compound [A] Lapper [B] Valve Seat [C] Valve The seating area should be marked about in the middle of the valve face If the seat area is not in the right place on the valvecheck to be sure the valve is the correct partIf it is, it may have been refaced too muchreplace it Be sure to remove all grinding compound before assembly When the engine is assembledbe sure to adjust the valve clearance (see Valve Clearance Adjustment section of Periodic Maintenance chapter)