2004-2005 Honda TRX450R Factory Sevice Manual, Page 136Get this manual
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CYLINDER HEADIVALVE
IN EX IN EX IN EX IN EX
Valv lifter 0.0 Valve lifter bore 10 Cylinder head arpage
StANDARD 745 kPa (J.6 kgfcm108 psi) 0.160.03 (0.006 0.001) 0.28 0.