RickOliver wrote:

Druid wrote:Also if you look on modern bikes nearly all don't have one. You would have expected for example Moto-GP to have them if it made a difference and they don't.

I would take slight issue with Dave - having ridden RCs & NCs with & without I think the linkage gives somewhat better feel and rear wheel grip under braking on bumpy roads.

Of course any bike on which the rear brake torque arm is articulated and attached to the main frame rather than the swingarm achieves the same isolation of braking forces from suspension action as that RC30 arrangement and by varying the relative positions of the swingarm pivot and the front anchor point can be made either pro- or anti-squat.

However, a quick online rummage for photos would seem to suggest that most (all?) MotoGP bikes have their rear brake calipers anchored direct to the swingarm and a walk round our showroom has failed to turn up a single new or recent used bike with any other arrangement...