Look what fell off my 907ie today after a 120 mile ride. Fortunately it decided to throw itself off when parked up on my drive at the end of the ride. I would check your fans folks as it seems to be fatigue that caused it.
The actual central spinner shell has come away from the plastic fan housing which has become brittle and then cracked and shattered this caused the fan to drop off the motor housing.
The white paste you can see is just corroded alloy. The actual plastic covering has become brittle and warped and let go. It is essentially the fan housing that has corroded and obviously the hi velocity spinning has caused it to come loose.
I have cleaned it out and had hoped to press it back in and use a two pack resin glue to attach. The aperture has though shrunk so unsuitable. The fan motor is in perfect order. Since I now use waterless coolant the fan does not really activate that much apart from when I come to a standstill for longer than 5 minutes.( normally at the end of a ride).
You can see the three cross head screws that would be holding the fan plate and fan onto the motor.
As a fix you could easily rivet or screw precisely where the three black lugs are on the inner fan plate housing or glue it securely, however as I cannot sit the fan back into the plate housing due to the plastic shrinkage it's a non runner.
Luckily I have a spare which I swapped over.
I now have a spare motor and housing, will be interesting to see if this is interchangeable with any others in the Ducati range.
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