2006-2009 Honda TRX250EX/TRX250X Service Manual, Page 125Get this manual
CYLINDER HEADIVALVE CAMSHAFT TOOLS Valve spring compressor Valve guide driver, 5.5 mm (IN)
07757-0010000
07742-0010100
Valve guide reamer, 5.5 mm 07984-2000001
or 07984-2000000 (U.S.Aonly)
Seat cuner, 33 mm (IN 45)
07780-0010aOO
Seat cutter, 29 mm (EX 45) 07780-0010300