Interesting setup. When I got my 08 Guzzi, there were no rear brakes. Turns out, the rear brake lever actuates the rear caliper and the front left caliper via a proportioning valve under the seat. The front lever actuates only the front right caliper.
Struggled to bleed the rear so I replaced the MC only to discover the bleed nipple on the proportioning valve. Ultimately cleared the air after bleeding the valve and the. the front left caliper by actuating the rear brake lever. Italian Engineering at its finest.
Actually it works quite well. The rear brake is noticeably more effective at slowing the bike than the front. Malto Benni!
