Set the engine to the configuration described for the "checking and adjusting the valve clearances", previously indicated.
Position the tool 88765.1518 On the cylinder head: the part marked "a" should be on the intake side and the part marked "s" should be on the exhaust side.
Seat the plate (a) and tighten the screws (b).


Set the opening valve clearance to zero when the camshaft is in its rest position by fitting a feeler gauge between the upper rocker arm and the opening shim.
Lock the dial gauge into the seat of the stand marked "a" and position the fork probe against the face of the closing shim.
Set the dial gauge to zero when the valve is fully closed.
Rotate the intake camshaft so as to allow the intake valves to lift fully.
Check on the dial gauge that the measured value corresponds to the prescribed one (sect. 3 -1.1, Timing system/valves).
Repeat the same operation for the exhaust valves, using the dial gauge in the support seat 88765.1518 With the marking "s".
Refit the components by carrying out the same operations indicated in chapter "checking and adjusting the valve clearances", previously described.
Refit the components removed in the procedure.


Checking and adjusting the valve clearances
Checking the engine timingRemoval of the swingarm
Before removing the parts in question, you must first carry out the following
operations:
Remove the rear wheel eccentric hub as described in chapter "removal of the
rear wheel eccentric hub and rear wheel
shaft" of this section.
Loosen screws (7) and remove the hose grommets (13), (15) ...
Refitting the cylinder head assemblies
Warning
To prevent oil leaks past the contact area between cylinders and
crankcase, each time the head is removed, cylinder and
piston must be removed as well to clean the mating faces of crankcase and
cylinder and restore the spoiled gaskets and
o-rings and apply again liquid sealant (sect. ...
Removal of the control unit
Loosen the screws (1) and remove the relay supporting bracket (2), disconnect
the connectors (3) and remove the control
unit (4) from the vehicle.
...