2006-2014 Honda FourTrax ATV TRX250 EX TRX250X Service Manual, Page 134Get this manual
CYLINDER HEADVALVECAMSHAFT Lubricate the valve stem sliding surface with molybdenum oil solution Insert the valve into the guide while turning it slowly to avoid damaging to the stem seal
SPRINGS
RETAINER
Install the inner and outer valve springs ith the tightly wound coils facing the combustion chamberInstall the spring retainer
Combustion chambe si de
To prevent loss of tension, do not compress the valve springs more than necessary