Ducati SCRAMBLER 800 Workshop Manual page 620

Fix manifold (1) to the horizontal head by starting screws (10) and tightening them starting from one of the
two following the procedure below:
The first one to 6 Nm ± 10%;
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The second one to 24 ± 10% Nm;
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Then again the first one to 24 ± 10% Nm.
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Fit the two clips (19) on the primary exhaust pipe (3) as shown in the figure.