How To: 03-05 R6 & 06+ "S" Rear Brake Line Install

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Ok yeah anyway no need to explain , its a freakin write up on a rear line yada yada yada yada my camera sucks moving on ....


Necessary Stuff

- Speigler Brake Line
- Allen Keys
-Brake Fluid (i used Spectro)
-Vice Grips of a sort
-Brake Fluid Hose (i used aquarium tubing)
-Phillips Screw Driver
-Ice pick like thing
- Allen Socket bits if you have them ( good but not necessary)
- Check Factory Torque Specs , If not use Speigler Torque Specs which are 13-16ft/lbs for the fittings

(no beer was required for this , and it was all done in about an 30min)




Start by unscrewing your brake fluid resevoir so you can take off the lid



then take off the lid , and put it back with the bolt in just finger tight so fluid doesnt get all over the place when you take off your rear set



Now take an 8mm wrench and some of that aquarium tubing or whatever kinda tube you want to use and put it around the nipple on the caliper turn it counter clockwise just a bit and start pumping the brake pedal. If you need to build up pressure first pump it a few times then open the nipple , then drain the fluid



Unbolt the rear set



Break tension on the Rear Master Bolt


now put the rearset back on with the bolts just finger tight and move over to the rear caliper. Here it is actually alot easier to take of the exhaust so you have more room to work , but the hanger on the Yosh TRS is a bitch and i dont feel like messing with it. Break the tension on the rear bolt and expect some fluid to come out , Here you can use the allen key turn sideways or you can use the allen sockets and an extension if you have it. Turn CounterClockwise



after you have that bolt/hose off , then follow the brake line and start unclipping the plastic clips so you can remove the brake line. I didnt figure out how to open those clips , so i used the icepick looking thing to help out .



now but the cap back on your resevoir and unbolt your rearset and remove the other end of the brake hose from your master cylinder and expect more fluid to leak out. It is also easier here if you unbolt your Taillight sensor thing. Now that the whole liine is off , take this time to clean your swingarm if you want or just clean whatever you have spilled. Now get your line and start fitting the rear with the bolt and new ALUMINUM washers that have been provided for you.



Start fitting the rear brake line and once it fits right into place (inbetween the mounting tabs also ) go ahead and tighten it down



Now move over to your rear set and figure out how your gonna turn your brake line so it bolts up to the master cyl.



Luckily i had Speiglers which have that rotating end fitting going on. The plastic pieces speigler gives you to rotate the fitting just stripped on me so i used vice grip with electrical tape on them to rotate the fitting. Then mount it to the rear master once you have fitted it




After everything is fitted and torqued back to spec go ahead and move your brake line into the clips. You dont have to , i have seen people not do it , but i think it looks better



Now here you should start bleeding your brakes . I am no certified motorcycle technician SO I CANNOT TELL YOU WHAT TO DO , but if i were to guess how to bleed lines i would ASSUME its done like this

1)add fluid to resevoir
2)open rear caliper nipple
3)start pumping pedal
4)when larger air gaps in line are less noticed close the nipper
5)pump the pedal a few times , then open again (make sure there is always a good amount of fluid in the resevoir)
6) after doing this a few times and you think all the air is out go ahead and pump and hold the pedal down
7)quickly tighten the rear caliper nipple
8)pump rear brake pedal a few times til you get the feeling back
9)Top of fluid to the line
10)Put on cap and plastic thing
11)Bolt Rear Resevoir back into place
12)Stop to admire BMW valve stem caps on bike via picture taken from a shitty camera





anyway enjoy the write up , if you have negative criticism , then more power to you call someone who cares. If you see something i have done wrong and could have been done better , safer , quicker , or alternatively .... please feel free to point this out. I will be adding a Front Brake Line HOW TO within the next few days

i dont even know what needs to be safety wired for racing , i dont have a drill press either ... sorry

Just an alternative way to do it if youre not looking to change the fluid such as a new bike. Im sorry but I dont have any photos but this how we do it at the shop.

Well the quickie method. Works for both front and rears. Typically we will remove the entire brake assembly and do it over the wash tank.

Remove the calipers from the mounts. Squeeze the brake lever until the pads in the caliper touch. They just need to be touching flush and dont have to be touching hard. At this point the calipers will be full of fluid. Swap lines. Separate the pads without damaging them. Now you have moved the fluid from the calipers up the new lines and back into the reservoir. Now it will just require minimal bleeding at the master cylinder to get a nice firm lever.

When I did mine this year it required no extra fluid but always keep and eye on the reservoir so you dont accidentally pump air into the system.

whatever happend to this? raven did you pull a cever?

Thats kinda messed up man...