brake help

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22 Aug 2012 22:47 - 22 Aug 2012 22:49 #544199 by 650ed
Replied by 650ed on topic brake help
No; it does not make sense that all 3 MC are shot. It is more likely you simply are not having any luck bleeding them. You may want to try a vacuum bleeder (see Tools section for simple home-made version) or my favorite - a KD-2222 pressure bleeder instead of pumping the lever over and over. If you can find a friend with a pressure bleeder all you need is an old MC cap and some epoxy resin to make an adapter for your MC. Ed

1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
Last edit: 22 Aug 2012 22:49 by 650ed.

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22 Aug 2012 23:30 #544206 by wireman
Replied by wireman on topic brake help
Try removing the brake line from master cylinder and have somebody hold a big pan directly under it to catch any fluid spraying out.
Top the master cylinder off with fluid and put cover back on.
Now hold your thumb tightly over the hole where banjo bolt would normally go and start squeezing lever in/out slowly.
After pulling it in 3-4 times hold lever to bar and release your thumb to let the air out ,then clamp your thumb back on and repeat several times till you start feeling some resistance in the lever.
MAKE SURE TO KEEP THE BRAKE FLUID OFF PAINT AND CLEAN IT UP WITH WATER IF YOU MISS SOME!!!!!
Make sure to keep fluid topped off while doing this.
If you can find a piece of pipe or handle bars to clamp in a bench vise to do this on its even easier.
Hook lines back up and bleed rest of system B)

posting from deep under a non-descript barn in an undisclosed location southwest of Omaha.

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22 Aug 2012 23:36 #544209 by DiamondSkyBlue1000
Replied by DiamondSkyBlue1000 on topic brake help
This is assuming everything is in tip top shape on your brakes and all you need to do is bleed them:
Do you still have the stock splitter on it? It's part #23 on the parts diagram, it holds the front brake-light switch. Notice how it sits on the lower triple tree. The elbow on that sumbitch points upwards at a slight angle. When you took that upper hose off, you introduced a nice bubble of air into that thing. Now, with the smaller braided line, you are only moving that bubble back and forth a little bit every time you squeeze the lever. It is trapped in that dang splitter. A couple of things you can do, make sure your M/C cap is on or you will spill all the fluid out, park the bike on the side stand on an incline (ass end of the bike much higher than the front end) with the front wheel turned all the way to the left. This will remove that high point in the splitter. Or, you can take it off of the triple tree and move it around to get rid of the high point. Either way... Pump the brakes several times and tie a rag around the lever so it it tight against the handlebar grip and leave it overnight.
Try to bleed it again the next day to get the rest of the air out. You should have a rock solid lever after that.
The best way to bleed these brakes when you take lines off and especially when you put those skinny braided lines on is to reverse bleed them. You introduce fluid into the system by injecting it into the calipers through the bleeder valves. Even then, if you go too fast, that splitter will bite you in the patoot again.
The following user(s) said Thank You: vondikka

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25 Aug 2012 04:38 #544662 by vondikka
Replied by vondikka on topic brake help
Oh yea! got mybrakes done. I bought a large syringe and some clear tubing and used it to fill the brake lines and MC through the bleeder screw. it worked perfectly.

78 KZ650 C2
76 kz400 D3

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