Yes, that sheet metal ring. Three screws. Doesn't prevent spoke breakage. Just prevents the broken tip from falling between the rotating wheel and the stationary drive box. Bad juju. For the '98EV, in the U.S. Guzzi was required to replace the entire wheel and include the ring. In the UK, Guzzi was only required to add the ring to the existing wheel.
Patrick Hayes
Fremont CA
two EV's