Refitting the cylinder head

1. Assemble the connecting rod-piston set complete with half bearing using a suitable installing tool.

NOTE: The connecting rod-piston sets should be assembled in the crankcase with the combustion chamber on the piston facing towards the intake side.

2. Assemble the connecting rod cap complete with half bearing and fasten it with its screws without locking them.

NOTE: The connecting rod caps should be assembled so that the number stamped on them points towards the same side as the one stamped on the connecting rod big end (intake side).

• Proceed in the same way to assemble the pistons and connecting rods of the remaining cylinders.

1. Tighten the connecting rod cap screws to the specified torque using tool no. 1.860.942.000 for angle tightening.

24 ÷ 26 Nm + 60°
2.5 ÷ 2.7 kgm + 60°

REFITTING THE CYLINDER HEAD

1. Measure the protrusion of the pistons on two points at 180°, on the gudgeon pin axis using tool no. 1.820.253.000 and calculate the average of the two values measured for each piston.

• Choose the thickness of the cylinder seal to be used, according to the maximum value between the averages of the protrusion of each single piston.

• Position the cylinder head centering bushes on the crankcase.
• Assemble the cylinder head seal of the chosen thickness.