2006-2014 Honda FourTrax ATV TRX250 EX TRX250X Service Manual, Page 120Get this manual
CYLINDER HEADVALVECAMSHAFT TOOLS Valve spring compressor 07757-0010000 Valve guide driver, 5.5 mm (IN) 07742-0010100 Valve guide reamer, 5.5 mm 07984-2000001
or 07984-200000D (U .S.Aonly) Seat cutter, 33 mm (IN 45) 07780-001 0800 Seat cutter, 29 mm (EX 45) 07780-001 0300 Flat cutter, 33 mm (IN 3207780-0012900
or equivalent commercially available in U.S.AFlat cutter, 30 mm (EX 32) 07780-0012200