Ducati 750 Sport Owner's Manual page 34

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The open engine
This figure shows the half crankcase
timing side with all of the inner engine
components. Clearly visible are all of the
thrust washers, painted in red, which are
needed to eliminate end float in the various
shafts. When removing these shafts, take
special care to avoid mixing the thrust
washers, since they must be refitted
exactly when assembling the engine.
Removing the transmission shaft
With a hardened steel naif remove the stop
ring, washer, spring and slide coupling;
remove the Seeger ring and take out the
starter gear with a pair of pliers. Then
remove the transmission shaft from its
seat.
Removing the starter shaft
To remove the starter shaft, remove the
screw that holds the pedal return spring.