2000 Yamaha YFM400FWA(M) Factory Service workshop Manual, Page 137Get this manual
CAMSHAFT, ROCKER ARMS AND VALVES CAMSHAFT, ROCKER ARMS AND VALVES
Job namePart name Camshaft, rocker arms and valves removal Intake manifoldO-ring Thermo switch Oil check bolt Lock washerbearing retainer Camshaft Rocker arm shaftO-ring Rocker arm Locknutvalve adjuster Valve cotter Valve spring retainer Valve spring (outer)