2004-2005 Honda TRX450R Factory Sevice Manual, Page 152Get this manual
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CYLINDER HEADIVALVE Use 45 seat cutter to remove any roughness or rreg ularit ies ro the seatTOOLS: Seat cutter, 35 mm (45 INSeat cutter, 33 mm (450 EX) Cutter holder, 5.5 mm
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