The usual—to bolt the caliper to the swingarm itself. This, by transmitting 100 percent of rear brake torque to the swingarm, compresses the rear suspension. Back in 1980, when Kenny Roberts was languishing in bed after his preseason testing crash, Skip Aksland was having trouble being outbraked in practice at Daytona by Dale Singleton. Roberts said to Aksland, "Did you ever think about using the rear brake just before the front?" That initial application of rear brake pulled down rear ride height, allowing the rider to use the front brake a bit harder without lifting the rear wheel off the pavement.
An alternative—to make a full-floating rear caliper with a strut running forward to the chassis (and with the strut being parallel with the central plane of the swingarm). By feeding rear brake torque forward into the chassis, this makes it possible to use the rear brake over rough pavement without causing upsetting brake hop.