2004-2005 Honda TRX450R Factory Sevice Manual, Page 154Get this manual
CYLINDER HEADIVALVE Install th intake and exhaust valve springs with th ti gh ly wound coils fac ing the co mbustion cham berInst all he spring ret ain er
Combustion chamber side
To prevent loss of Install the alv cotters using the alve spri ng co tensoo, do not pressorCOfTIfYess the valve springs more than TOOLS :
SPRING COMPRESSOR
necessaryValve spri ng compressor Co pressor attachm ent
onS7)010000