Front brake doesnt actuate rear brake

[EASYRIDERTOO]

I m a newbie, just got a 1984 GW 1200 Interstate, when I use the front brake, the rear brake do nothing, I thought both front and rear should work together, the bike dont stop as good as it should
But when I use the rear brake, both wheels stops. What could the problem be? Thanks, to the pros.

[MJSantos]

What your talking about is the "Linked Brake" system. Your hand brake will only apply one caliper on the front. The foot pedal controls the rear master cylinder which is tied to a proportioning valve which feeds the rear caliper and also feeds the second front caliper. 5f you chase the brake line from the hand brake you'll see it direct connected to one of the front calipers. On an 83 it will be the right not sure on the later model.

[EASYRIDERTOO]

MJ,

So this means that my brake system is working, front controls only front brakes, rear controls both front and back.

When I apply the front brake, it is not grabbing, feels like there s oil between pad & disc, I clean and deglazed the disc and pad, (brake kleen) What can I do to make the front grab a bit make it stop better.

Thanks

[rosey1]

PROBABLY NEED TO REBUILD THE CALIPER AND /OR THE MASTER CYLINDER. GOOD LUCK