"Alternator/Flywheel"

by Chris Edwards


Use a puller to ease the cover off the left side of the engine. These pullers are relatively cheap, about $10, from most automotive stores. You will need a couple of metric bolts.

 (Pic 1)

On the earlier 916's and prior 888 and 851 models there were two pickups. The pickup on the right, as viewed in the picture, is the ignition. The pickup at the top center is for the tachometer. This was not required and left un-drilled on later models. Also on the later models, the ignition pickup was moved about a 1/4" closer to the edge of the casing. (Alternator cover differences)
 

(Pic 2)

I made some home made clutch tools out of a set of used clutch plates. This is the easiest method of holding the crank still while undoing the flywheel nut.

 (Pic 3)

The Flywheel nut loosens ANTI-CLOCKWISE.

Torque; 996 (138 ft/lbs)

Monster Models (115 ft/lbs)
SS/SL (1991 to 1993) (130 - 138 ft/lbs)
SS/SL ( 1994 - on) (133 - 140 ft/lbs)
 

 

(Pic 4)

Behind the flywheel nut is a conical/domed washer. The high point of the dome, i.e. the center hole, should be away from the center of the engine.

(Pic 5)

 

(Pic 6)

The rotor magnet must be installed with the Ducati stamp and part number towards the center of the engine.

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When the flywheel is installed on the crankshaft, the punched dot on the flywheel aligns with the key slot on the crankshaft.
 

(Pic 8)

The flywheel and starter gear usually pull off together.

 (Pic 9)

To get at the starter sprag clutch the starter gear pulls off the back of the flywheel.


(Pic 10)

 

(Pic 11)

With the flywheel and the starter gear off it is possible to see the dots on the crank gear and the camshaft gear. When the crank is turned these should align.

Sprag Clutch

A related website describes how to modify the spring in the sprag clutch. (Click Here)

 

 

(Pic 12)

The picture left picture shows the starter motor gear in the bottom left corner, which drives an idler gear which in turn spins the starter gear and engages the flywheel via the starter sprag bearing which turns the motor over.

* Note: When tightening the flywheel nut, place a piece of soft metal, i.e. a penny, between the teeth (indicated by the arrow) on the starter pinion and idler gear, to stop the crankshaft turning.

   (Pic 13)

 

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 (Pic 15)
* Note:
Gear change linkage adjuster

The two photos above  show the gear change mechanism.

 

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