2007-2009 Honda TRX300EX TRX300X service manual, Page 132Get this manual
CYLINDER HEADVALVE Route the cam chain through the cylinder head and, "'- install the cylinder headTake care not 10 Apply engine oil to the cyl inder head cap nut and drop the nuts and socket bolt threads and seating surfacewashers into the Install the cap nuts and socket bolts tighten them to crankcasethe specified torque in crisscross patten in several
stepsTORQUE: Cylinder head bolts: Cylinder head cap nuts: 39 Nm 39 Nm kgfm, 29 Ibf.ft) kgfm, 29 Ibf.ft)
Make sure that the oil pipe and oil pipes bolts are not clogged