2001-2005 Honda TRX250EX Sportrax TRX250EX Factory Service Manual, Page 98Get this manual
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CYLINDER HEADVALVE VALVE SPRING Measure the valve spring free lengthSERVICE LIMITS: Inner: 41 .2 mm 11.62 in) Outer: 43.0 mm 11.69 in)
Valve guide reamer, 5.5 mm
07984-200000