Join Date: Aug 2008
Location: Bluemont Virginia
Mentioned: 0 Post(s)
This is all my opinion from my years of road racing so take it or leave it. For the most part its all been proven to work out at least for me and the bikes I've raced. Mostly jap bikes but I did a year on a Ducati and if your talking about the rear brake and I assume you are they have a rear brake set up that will lock up a Mac truck.
Because the rear brake line is so short, any benefit from a stainless braid line is minimal. It is an improvement, but not much. Rear brakes are
intentionally made weak because 99% of the braking force is the front. At max braking, the rear is barely touching the ground and therefore is only
able to contribute a little. If skill level of the rider is on the high scale then the rear wheel may not even be on the ground. If they made it more powerful, people riding the street would be locking it up all the time.
If you went with a slightly smaller master cylinder, your travel would increase but the braking power would too. A larger master would reduce the
travel but require more effort. Think of a plank trying to lift something. The question here is are the rotor, pad and swept area adequate and is the weak link the master? Braking power is also affected by caliper rigidity (much more so than brake line type), pad material, amount of swept area (size of the pads) and rotor diameter. Smaller rotor covers less distance and therefore need more power to slow it, this is why the front rotors are large, back are small.
In most cases when I had issues of weak breaks or break fade the master cylinder was the ticket.
What change will solve weak rear brakes on the versys? Good question. Unfortunately, unless someone else has 'done the fix', you get to be the first and
experiment. If you hear of another bike with strong rear brakes, (ducati) take a look at the brakes. Measure the rotor diameter. Is the caliper a single or a double?
Last edited by douglasgraham; 09-18-2009 at 12:33 PM.