Checking valve lift
Remove the seat (Removing the seat).
Remove the side fairings (Removing the fairings).
Remove the fuel tank (Removing the fuel tank).
Remove the airbox, the blow by and the oil breather pipe (Removing the airbox).
Remove the supply system and the injectors from the intake manifolds (Removing the throttle body).
Remove the water radiator lower retainer from the engine (Removing the water radiator).
Remove the cylinder head covers (Removing the camshafts).
Note
For clarity, the figures show the engine removed from the frame.
Move the piston of the cylinder being checked to TDC upon combustion stage: in this condition, all valves are closed and the camshafts come in rest position and, therefore, free to rotate; check the valve lift.
Fit tool (G) no. 88765.1690 on the head: support (S) of tool no. 88765.1690 with the intake indication must be positioned on the exhaust side whereas support (T) of tool no. 88765.1690 with the exhaust indication must be positioned on the intake side.
Seat the plate (E) and tighten the screws (F).
Set the opening valve clearance to zero when the camshafts are in rest position by fitting a feeler gauge, of suitable thickness, between the upper rocker arm and the opening shim.
Lock dial gauge (V) into the seat support (T) and position probe (R) 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.
Repeat the same operation for the exhaust valves, using dial gauge (V) in support seat (S) and probe (U).
Specified values:
 
Valve lift
 
Valve lift - valve clearance of 0 mm
 
Intake 11.3 mm
Exhaust 9.6 mm
 
Timing diagram
 
Timing diagram with valve clearance of 1 mm
 
Intake
 
Opening 4° B.T.D.C.
Closing 52° A.B.D.C.
 
Exhaust
 
Opening 58° B.B.D.C.
Closing 7° A.T.D.C.
 
Intake valve diameter
 
35.5 mm
 
Exhaust valve diameter
 
28.8 mm
Refit the cylinder head covers (Refitting the camshafts).
Refit the water radiator lower retainer on the engine block (Refitting the water radiator).
Refit the supply system and the injectors from the intake manifolds (Refitting the throttle body).
Refit the airbox, the blow by and the oil breather pipe (Refitting the airbox).
Refit the fuel tank (Refitting the fuel tank).
Refit the side fairings (Refitting the fairings).
Refit the seat (Refitting the seat).