2006-2014 Honda FourTrax ATV TRX250 EX TRX250X Service Manual, Page 142Get this manual
CYLINDER HEADVALVECAMSHAFT Be careful not to damage the sliding surfaces of the follower and bore
Apply engine oil to the entire surfaces of the cam followers Install the cam followers into the crankcase with the opening facing upInstall the following- change clutch (page 10-22)cylinder (page 9-7)