2004-2009 Honda TRX450R/TRX450ER Service Manual, Page 220Get this manual
CYLINDER HEADVALVE Install the two dowel pins and new gasketCHAIN GUIDE
Route the cam chain through the cylinder head and CHAIN install the cylinder head" Apply engine oil to the threads and seating surfaces of the cylinder head nuts and install them with the washersTighten the four nuts in crisscross pattern in several stepsTORQUE: 54 (5.5 kgf-m, 40 Ibf-ft)