Hi all, I have just completed a full brake overhaul on my '94 1000FR, removed all 3 brake calipers, disassembled the components (except the pistons which I left alone) fully cleaned them and refitted everything with genuine honda pads, I refitted the Banjo bolts with brand new copper washers, and torqued them up to 30ft/lb (Honda say 25)

I have adhered to the bleeding sequence

Front right caliper upper bleed screw, front hand brake lever/master cyl
Front left caliper upper bleed screw, front hand brake lever/master cyl
Front right caliper lower bleed screw, rear foot brake lever/master cyl
Front left caliper lower bleed screw, rear foot brake lever/master cyl
Rear caliper rearmost bleed screw, rear foot brake lever/master cyl
Rear caliper foremost bleed screw, secondary master cyl fork leg & rear footbrake reservoir.

I succesfully bled each bleed screw as above, but upon double checking by repeating the procedure the following day to ensure any accumulation of small air bubbles, had been expelled, I encountered far more air out of each bleed screw than I ever expected to see......

I have once again today repeated the procedure and at every bleed screw there is five full strokes of large bubbles (but no small tapering quantity of decreasing bubbles) from each individual bleed screw, which is repeated every time I repeat the process.

I can observe no fluid leakes anywhere.....

anyone have any clues or similar experiences, I'm starting to run out of ideas.......

Best wishes

John

 

Hey there Black , sorry to hear about your troubles.

'Fraid I don't have the linked system either , but I did do my brakes recently and it took forever to get any pressure in the system.
When you crack the bleed screw , I find you've just got to crack it by the slightest amount , otherwise air feeds back into the system almost immediately . Once your getting some feel at the leaver it's not so bad , but you've still gotta be quick .

Alternatively you could try something like this


Kilgore Trout has the later model with linked brakes and may be able to shed more light on the subject for you I hope.

 

Thanks for the suggestions fella's, I had managed to obtain a good pressure at both the levers (and the secondary front master cylinder)

I'll have another session next weekend when it's light again, and pay particular attention to the slight opening of the bleed screws, so as not to let any more air in.....

thanks for the Ebay link Hawkwind, I've decided to invest in one, for a tenner it's got to be worth a look, I've spent more than that on DOT4 already.....just gotta hope the postal strike sorts its self out quickly now

Best wishes.

John

 

Plenty of previous history on this problem - check history.
There is a specific sequence for bleeding the brakes on linked brake models I think..........................

 

There are some tips in the search.
However, I think the sequence he used is the correct one. Sounds right.

But with all brake systems, they can be a PITA. Hawk is right on with air coming back through the bleeders. That's why the check valve bleeders help.
You could also have some air that's slowly coming out of the calipers, too, if you got any in them.
I'd smack and shake stuff and keep bleeding it. Vac systems help, too.

 

Yep two people and a vac is a good way to go at it. You seem to be doing it in the
right order though............But I too am lucky too.......mines not a linked system
either thankfully.

 

Thanks for all the positive suggestions guys, I'll check out the search facility.

I shall persevere, and keep you posted


Ride safe.

John

 

Try this - Bicklebok had some real issues....!
https://cbrforum.com/forum/cbr-1000f-hurricane-38/continued-braking-problems-93-model-81289/

 

I have wrestled with mine quite a bit (about a gallon of brake fluid! LOL)so I may be able to offer some insight. Did you open the orifice bolt on the front forks when bleeding? I forgot which calipers you have to do it for but I think its for but I can look in the manual. Didnt see wheere you mentioned that in your post.

I ended up putting teflon tape on my bleeder screw threads and putting a vacuum pump on it. I think it can be done without it, but were a B to bleed!