Yamaha F400A 2022 - Power Unit

Power unit
Wire harness..................................................................... 7-30
Removing the wire harness...................................................... 7-31
Installing the wire harness........................................................ 7-33
ECM, injector driver, and rectifier/regulator ................. 7-37
Removing the rectifier/regulator............................................... 7-38
Checking the rectifier/regulator anode..................................... 7-38
Installing the ECM and injector driver ...................................... 7-38
Installing the rectifier/regulator................................................. 7-38
Ignition coil and spark plug............................................. 7-40
Checking the spark plug .......................................................... 7-41
Installing the ignition coil and spark plug................................. 7-41
Timing belt ........................................................................ 7-42
Removing the timing belt ......................................................... 7-43
Checking the timing belt .......................................................... 7-43
Installing the timing belt ........................................................... 7-43
Camshaft........................................................................... 7-46
Removing the camshaft, VCT assembly, and driven
sprocket ................................................................................... 7-48
Checking the sprocket ............................................................. 7-49
Checking the cam chain........................................................... 7-49
Checking the cam chain tensioner........................................... 7-49
Checking the valve lifter........................................................... 7-50
Checking the camshaft ............................................................ 7-50
Checking the camshaft journal oil clearance ........................... 7-51
Checking the camshaft journal outside diameter and
camshaft journal inside diameter ............................................. 7-52
Installing the camshaft, VCT assembly, and driven
sprocket ................................................................................... 7-53
Cylinder head.................................................................... 7-58
Removing the cylinder head..................................................... 7-59
Disassembling the cylinder head ............................................. 7-59
Checking the cylinder head...................................................... 7-59
Checking the cylinder head bolt .............................................. 7-60
Checking the valve spring........................................................ 7-60
Checking the valve................................................................... 7-61
Checking the valve guide......................................................... 7-61
Replacing the valve guide ........................................................ 7-62