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Discussion Starter #1 (Edited)
I want to run this by you guys for some help.

On My 2000 RC51, the brake lever was nice and firm, but the fluid was horrible. On top of that I needed to put new pads on it too. I cleaned the calliper pistons, but didn’t remove them. Pushed them back in after cleaning and installed new pads. I bled the brakes like I have many many times, never let the fluid get too low, used pressure bleed method, but the lever feels very spongy and it now also creaks and makes a noise at the master cylinder, almost like the Bell ray Super DOT4 fluid doesnt lubricate enough.

I can get it to firm up if I pump it a few times, but it goes soft again after a while.

Ive re bled 3x

No bubbles at all

Im wondering if I have shit binding the calliper pistons and they are sticking ?

Ive tied the lever back over night and its firm after I do that but goes soft again after a short while

Thoughts?
 

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Discussion Starter #3
No I just bled the callipers. I had no air at all before I started, I was just changing the fluid. you think the creaking lever could be air in the master. ? maybe crack the banjo bolt at the master and bleed there too ?
 

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That's the next place I would check. By cleaning the pistons and pushing them back in, that might press any air up through the lines to the highest point. Sometimes you even see the bubbles surface in the reservoir but air can get trapped at the banjo bolt. it does not take much to get a spongy lever feel.
 

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Discussion Starter #5
OK, THANKS BTopp, will try that in the next day or so, supposed to get a pile of rain here this week so ill be trapped in the garage instead of the farm fields.
 

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Discussion Starter #6
That's the next place I would check. By cleaning the pistons and pushing them back in, that might press any air up through the lines to the highest point. Sometimes you even see the bubbles surface in the reservoir but air can get trapped at the banjo bolt. it does not take much to get a spongy lever feel.
Did this yesterday, moved the pistons out (all 8) and re cleaned them, pushed them back, re-bled (no bubbles), tied the lever back and we'll see how it is later today after the lever is untied for a while.
 

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Did it work for you? I've had this problem in the past with both the clutch and brake master. Anymore, I start with bleeding the masters first, then the bleeder valves at the caliper or clutch slave cylinder.
 

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Discussion Starter #8
So far its much better but not 100% (like my SP2).

not a single air bubble when I re-bled it, but seems to have helped to some degree pushing the pistons out and cleaning them again and pushing them back in.

Truth is, I think the Master and the callipers could do with a disassembly and deep cleaning all the crud out.
 

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Discussion Starter #10
all Honda parts too ?
 

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I just did both my front and rear calipers. I ended up using the All Balls Racing kit. The kits were half of the factory stuff. Seals are good quality and I had zero fitment issues. The only thing I wish was in the kit would be seal lube. Brake fluid just doesnt work as a lube.
 
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