The ARC Bolt Guard is designed to minimize brake master cylinder bolt damage from Roost and flying debris that can bend the bolt or compress the sealing washers to the point of leaking.
The protection provided by this guard may not win you a race but it may keep you from losing one.
ARC Master Cylinder Banjo Bolt Guard
Nissan Master Cylinders;
Kawasaki & Suzuki (Wide)
Yamaha (Thin)