2004-2009 Honda TRX450R/TRX450ER Service Manual, Page 199Get this manual
CYLINDER HEADVALVE After '05: ITEM Cylinder compression TRX450ER TRX450R Valve clearance Decompressor clearance Valve, valve guide Valve stem O.DValve guide I.DStem-to-guide clearance Valve guide projection above cylinder head Valve seat width Valve spring Exhaust rocker arm Camshaft Free length Arm I.DShaft O.DArm-to-shaft clearance Cam lobe height IN EX IN EX IN EX IN EX IN EX IN EX IN EX STANDARD 343382 kPa (3.53.9 kgfcm2,5056 psi) 961 -1000 kPa (9.8-10.2 kgfcm2,139 145 psi) 0.16 0.03 (0.006 0.001) 0.28 0.03 (0.011 0.001) Right side exhaust valve clearance0.25 0.02 mm (0.010 0.001 in) 5.4755.490 (0.21560.2161) 4.9654.980 (0.19550.1961) 5.500-5.512(0.2165-0.2170) 5.0005.012 (0.19690.1973) 0.0100.037 (0.00040.0015) 0.0200.047 (0.00080.0019) 16.1-16.3(0.63-0.64) 17.9-18.1 (0.70-0.71) 1.1-1.3(0.043-0.051) 1.3-1.5(0.051-0.059) 40.68 (1.602) 42.82 (1.686) 12.00012.018 (0.47240.4731) 11.96711.975 (0.47110.4715) 0.0250.051 (0.00100.0020) 35.04035.280 (1.37951.3890) 34.21434.454 (1.34701.3565) 25.97825.993 (1.02281.0233) 26.01026.026 (1.02401.0246) Unit: mm (in) SERVICE LIMIT