Draining the brake fluid
Brake fluid is corrosive, so make sure you are wearing clothes you don’t care about, don’t have any exposed skin and are wearing eye protection.
On your front brake calliper, there are two nuts on the brake line that you’ll need to break away from each other. Once these are undone, your brake fluid will start dripping out, so make sure you have a tub or jerry can to catch it. To encourage draining, hold the reservoir up and pump the brake to push it all out.
On your rear brake calliper, to drain the brake fluid you need to undo the union bolt using an 8mm spanner, then put the pipe into your tub or jerry can to drain it. Again, you can pump the foot brake to encourage the brake fluid out.
Front Brake Calliper
Once the brake fluid has been drained from the system, we can start removing the pipe. Where it feeds through the yoke, there is a small rubber grommet holding it secure. To remove this from the yoke, put sideways pressure on it and move it back and forth until it eases out. Once it’s out, you can feed the pipe through the bottom and top yokes.
The brake calliper is help on with two torque bolts (H8) – remove these and the calliper should slide off. If you got any brake fluid on your discs, clean them straight away to avoid any corrosion.
Rear Brake Calliper
There is more to removing the rear brake calliper, as we need to loosen the arm and drop it down so we can access the two bolts that hold the calliper in place. The first thing you need to is release the arm from the swing arm. To do that, remove the rubber cover on the swing arm and remove the split pin, then the 8mm allan key bolt (secured by a 17mm nut) underneath it. After that, we need to loosen the 19mm nut on the axel, just enough to provide the movement needed to access the bolts. When we have that movement, undo the two 8mm bolts and slide the brake calliper free.
Please note
Please keep in mind that when you remove the brake callipers there will still be fluid in them, so don’t leave them tipped upside down without draining them properly. To drain them properly, just turn them upside down in a bucket and they will slowly drain.