Recently been having starter motor engagement issues, 2011 Stelvio NTX, 13500 miles
The first couple of attempts to start My bike it would just spin but not engage Flywheel, aventualy it would start.
I remembered reading a Tech memo about cleaning starter motors, as some where being replaced under warranty.
It took about one & half hours, followed Tech memo, stripped motor cleaned and greased where needed, put back on bike, fired up first time, brill.
Marshy