2007-2009 Kawasaki KFX50 service manual, Page 119Get this manual
7CYLINDER HEADVALVES ASSEMBLY Install the valve spring seats and oil sealBe sure to install new oil sealLubricate each valve with engine oil and insert the valves into the valve guidesInstall the valve springs so that the closed coil end faces downwards and retainersCompress the valve springs using the valve spring compressor, then install the valve cottersWhen assembling, valve spring compressor must be usedInstall the cotters with the pointed ends facing down from the upper side of the cylinder headSpecial Tool: Valve Spring Compressor