Ducati 750 Sport Owner's Manual page 46

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Checking the bevel gear mesh
Once the two outer flanges and the
distributor have been fitted, check the
gear
mesh carefully as follows: With a sharp
pin, check the outer gear surface as shown
in the figure, to ensure the surfaces are at
the same level in the lapping zone.
To check mesh, rotate the gears to see if
there is any play or interference. For the
most efficient operation, there should be
no play or interference.
If play or interference is evident, adjust the
thickness washers above and below the
central upper conical gear. In this manner,
you can correct the mesh of the three
gears in the upper group.
Fitting the timing side cover
Before fitting the cover, ensure that the
three dowels are in good condition and in
the correct position. Then place the gasket
on the matching surface arid fit the cover
with the nine screws. When positioning
the cover near the matching surface, be
careful to avoid damaging the alternator
coils contained inside the cover. Also, to fit
the screw where the cable ,comes out of
the cover, first remove the bakelite rim as
shown in the figure.
Fitting the oil filter
Insert the filter by hand in its respective
hole and screw it in, making sure it is
positioned properly in the chain-side half,
crankcase. Then tighten with
a 21mm
wrench. .' .