Post by merrykoala on Jan 12, 2014 13:53:12 GMT
So I bought myself a nice Aprilia RST 1000 Futura a couple of months ago. The plan was to park her up til the new year then do all the little jobs ready for spring.
Apart from needing a new back tyre the only other major worry was pulsing felt through the brake lever.
Apparently this is quite common and doesn't always mean warped discs, although that was still a possibility.
The solution is to clean up the bobbins that hold the brake disc on to the rotor. Over time the bobbins get crudded up and don't move and therefore don't allow the disc to move.
I tried the remedy this morning and it might be worth trying for anyone else who might have bought discs off Lee. Worth pointing out that this only applies to floating discs with bobbins.
You will need some brake cleaner spray, mine was 4 quid from Boyes, a nut bolt and penny washers, I used M6 but experiment with yours and a suitable sized spanner and socket set. A paddock stand or centre stand will make the job easier also.
With the bike in position choose the first bobbin, it's a good idea to start with a spoke on the rotor that has been stamped so you know when you've done them all.
Feed the bolt through The centre of the bobbin and put the nut and washer on the back. Tighten with a ratchet and spanner until you can see the bobbin start to spin. Take the spanner off and continue turning the ratchet while spraying in the brake cleaner. It'll probably sound gritty at first but will improve as you clean, keep spraying and turning until the juices run clear.
When you're happy slacken off the nut and move onto the next bobbin.
When you're done you should be able to rotate the bobbins between your thumb and finger and the discs should move from side to side a little.
Took a little under an hour to do both discs and I felt the difference straight away. Since even pattern discs are 80 quid a shot it was a great result.
Apart from needing a new back tyre the only other major worry was pulsing felt through the brake lever.
Apparently this is quite common and doesn't always mean warped discs, although that was still a possibility.
The solution is to clean up the bobbins that hold the brake disc on to the rotor. Over time the bobbins get crudded up and don't move and therefore don't allow the disc to move.
I tried the remedy this morning and it might be worth trying for anyone else who might have bought discs off Lee. Worth pointing out that this only applies to floating discs with bobbins.
You will need some brake cleaner spray, mine was 4 quid from Boyes, a nut bolt and penny washers, I used M6 but experiment with yours and a suitable sized spanner and socket set. A paddock stand or centre stand will make the job easier also.
With the bike in position choose the first bobbin, it's a good idea to start with a spoke on the rotor that has been stamped so you know when you've done them all.
Feed the bolt through The centre of the bobbin and put the nut and washer on the back. Tighten with a ratchet and spanner until you can see the bobbin start to spin. Take the spanner off and continue turning the ratchet while spraying in the brake cleaner. It'll probably sound gritty at first but will improve as you clean, keep spraying and turning until the juices run clear.
When you're happy slacken off the nut and move onto the next bobbin.
When you're done you should be able to rotate the bobbins between your thumb and finger and the discs should move from side to side a little.
Took a little under an hour to do both discs and I felt the difference straight away. Since even pattern discs are 80 quid a shot it was a great result.
