Checking and adjusting the valve clearance
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 clearance on the cylinder head you are working on.
Checking the opening clearance
Using a feeler gauge (A), check the clearance between the opening rocker arm (1) and the lowest point of the camshaft lobe (2), taking care not to compress the rocker arm return spring. The value must be within the prescribed ones.
If not so, remove the opening shim (3) and replace it with one of suitable height to obtain the prescribed clearance.
Note
Opening rocker arm shims measuring 1.80 to 3.45 are available as spare parts: the size is punched on the shim.
Checking the closing clearance
Using a feeler gauge (A), check the clearance between the closing rocker arm (4) sliding shoe and the highest point of the camshaft lobe (5).
The value must be within the prescribed ones.
If not so, remove the closing shim and replace it with one of suitable height to obtain the prescribed clearance.
Note
Closing rocker arm shims measuring 2.2 to 4.5 are available as spare parts: the size is punched on the shim.
Specified values:
   
Assembly value
 
Check value every 24.000 Km
 
Opening rocker arm - intake
 
0.13÷0.18 mm
 
0.10÷0.25 mm
 
Opening rocker arm - exhaust
 
0.13÷0.18 mm
 
0.10÷0.25 mm
 
Closing rocker arm - intake
 
0.05÷0.10 mm
 
0.05÷0.15 mm
 
Closing rocker arm - exhaust
 
0.05÷0.10 mm
 
0.05÷0.15 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).