5-20 ENGINE TOP END
Using a wrench on the alternator rotor bolt, turn the
crankshaft clockwise [A] until the "R" mark line (TDC
mark for rear piston) [B] of the balancer chain sprocket
[C] is aligned with the line [D] of the crankcase.
Check that the rear camshaft chain timing is positioned
" " Mark [A] of Camshaft Sprocket
Timing Marks [B] of Weights
Upper Surface of Cylinder Head [C]
Right Side View [D]
The timing marks must be aligned with the cylinder head
Remove the camshaft chain tensioner (see Camshaft
Chain Tensioner Removal).
Loosen the M6 and M8 rocker case bolts as shown se-
quence [1 ∼ 6] in the figure, and remove them.
Lift the rocker case [A], and remove the front camshaft
chain guide [B] from the pin of the case.
The cylinder head and rocker case are machined in the
assemble state, so they must be used as a set. Be
careful not to mix them up for front and rear cylinders.
Rocker Case Installation
Before installing rocker case, check that the crankshaft
is positioned at TDC and at the end of the compression