rear brake efficacy

[1428 voyager]

Hi to all,
I couple of months I restore ZN 1300, bike is now running and I test it on road.
On the rear master cylinder I inserted new piston with new rubber - original Kawasaki.
all brake system was vented, no bubbles, no leakage or any failure, thickness of brake disc is enought , braking pads have 80%
I did this job many times on other bikes....

But according to my feeling rear brake is´t strong enought, braking force is so low,lever is too soft.
If I compare it with other bikes, which I had, this rear brake has very low efficacy.
I fully understad that this is about personal feelings and 1300 six is heavy bike.
But how brake yours rear brake?

[triton28]

I don't now about the 1300 but the 4 cylinder Voyager needs to be on the side stand to get all the air out of the rear caliper so the 1300 would probably need to be leaning to the right since your caliper is on the LH side of the rear wheel. Just a thought,
Dave

[GrandpaDenny]

I don't now about the 1300 but the 4 cylinder Voyager needs to be on the side stand to get all the air out of the rear caliper so the 1300 would probably need to be leaning to the right since your caliper is on the LH side of the rear wheel. Just a thought,
Dave

Really? Never heard this one before. I changed the fluid with the bike on the center stand and the rear pedal is firm as a witches' .... um we'll stop there.

On a related note, today would be a great day to change the brake lines, but it's hotter'n a witches'... um...

[Van Voyager]

Hi to all,
I couple of months I restore ZN 1300, bike is now running and I test it on road.
On the rear master cylinder I inserted new piston with new rubber - original Kawasaki.
all brake system was vented, no bubbles, no leakage or any failure, thickness of brake disc is enought , braking pads have 80%
I did this job many times on other bikes....

But according to my feeling rear brake is´t strong enought, braking force is so low,lever is too soft.
If I compare it with other bikes, which I had, this rear brake has very low efficacy.
I fully understad that this is about personal feelings and 1300 six is heavy bike.
But how brake yours rear brake?

Rear brake (and front) work pretty well on my 86 ZN1300 Definitly not soft. 'Soft' typically indicates air still in the circuit.