I would do the front first. That way you get all the old out and new in then do the rear. At least that was what I thought when I did mine over the winter. If you don't have a vacuum bleeder go get a cheap one. Well worth the money!!!

 

You have a reservoir for the only the front brake and a second reservoir for only the rear brake. It doesn't matter whether you bleed the front brake or the rear brake first as they are separate systems on this motorcycle.

Now to your actual question, which of the two bleeders do you bleed first. Each bleeder is associated with a single brake caliper piston. I would recommend removing the old fluid from the rear brake reservoir first (above your foot brake pedal). Then refill the reservoir with fresh DOT 4 brake fluid (4 has a higher boiling point than DOT 3). Then, with a fresh fill of new brake fluid in the reservoir for the rear brake I would recommend starting to bleed the rear brake at the furthest bleeder away from the actual brake line (the closest bleeder to the front of the bike). Then bleed the second piston. Bleed until the fresh brake fluid comes out each of the bleeders. This way you remove all of the old fluid from the system. Make sure to never release the brake pedal until the bleeder is closed, unless you have a tube on the bleeder and submerged in new brake fluid.

 

thanx

 

Check out the Gadget's syringe method if you don't have a bleeder. Works great, super easy & super cheap! I did both brakes & clutch in less than 15 min.
Hydraulics Bleeding (Brake and Clutch)

 

Check out the Gadget's syringe method if you don't have a bleeder. Works great, super easy & super cheap! I did both brakes & clutch in less than 15 min.
Hydraulics Bleeding (Brake and Clutch)

Very useful link. Just 2 questions about this syringe method : 1. During all proces we dont' touch brake lever? 2. When it's time to empty out full syringe, can we also close the valve for emptying full syringe instead "kink the hose" method?

 

I've always used the simple pump method. Since the foot pedal and bleeder valve are both within reach from the side, I pump and hold down the foot pedal, release the valve the tighten valve and repeat. I put a hose on the bleeder valve to allow drainage into a jar, cup, etc. When the old is almost empty from the reservoir, I fill with the new and repeat the process until, as NewRoadie indicated, the new comes through. Once the new fluid expels, tighten valve and fill the reservoir to the appropriate level. Done.

I've never been concerned about which bleeder valve to unscrew but I do the farthest one. Since the fluid hits both pistons, it must pass through the first to get to the second. Therefore, unscrewing the second will allow fluid to pass the first and expel any deposits.

 

You mean this one to bleed first?

 

You mean this one to bleed first?

Yep - farthest from the brake line and closest to the front of the bike.

 

Roger that. thnx