Bleeding new front brake system

Hey I installed new brake caliper piston seals, brake lines, and rebuilt the master cylinder. Tried bleeding it with no success, have to pump the brake level fast to get the pressure to build up. Need help.
Thanks

It's on a '83 midnight maxim 750

 

Go to a farm store or vet and get a large syringe. Hook that to a length of tubing and the other end of the tube to your bleeder fitting. Use the syringe to force feed brake fluid to the master cylinder. That will get most of the air out.

The remainder can be gotten by tying the brake lever to the bar, and using a vibratory sander on the caliper and line (working bottom to top) to get the remaining air to find its way out.

Since you already have the system full you could skip to the vibratory sander bit.
If you don't have one of those you can put the end of tubing on the bleeder, and the other end into a 1/2 filled bottle of brake fluid, open the bleeder, tie the lever to the grip overnight, and let gravity do the work.

 

Try this method for free, apart from the cost of the fluid,
fill the reservoir with fluid, remove the bleed nipple, hold thumb over bleed nipple hole, pull on the brake lever, then release thumb from bleed nipple hole and you'll hear a popping sound as the fluid is starting to be pulled through the system, repeat the procedure quickly/slowly/whatever, and soon fluid will come out of the caliper, replace the bleed nipple when this happens and then bleed the brake system in the usual way.
Job done, works every time.

 

81 Xj650 Maxim Brakes Bled in under 2 minutes.

3' clear hose, attached to bleeder and suck, keep an eye on the Master Cylinder level. And keep an eye on the clear hose . . . I never tasted brake fluid and don't intend to - just sayin'.

 

To me it seems easier to push air up and out of the system using the syringe method ad K-moe suggests. It is the way the bubbles want to go. My question is how is it done with the 2 disk setup? Do I need 2 syringes and must I do both at once, or can I go 1 side at a time?

Stumplifter, sucking on a tube 'til liquid squirts out is something I'll leave to the professionals!
I bought a pump for siphoning gas, too!

 

I do one side at a time. I've used vacuum bleeding on my 750 Seca, and never could get all of the air bubbles out by just vaccum bleeding.

As for siphoning gas.....don't suck, blow. Seal the tank opening with a rag and blow into the siphon hose to pressurize the tank. The fuel will push back out and will self siphon.

 

Aaaack! Too many jokes! Tiny brain meltdown!!!!
But seriously, thanks for the tip! I've also seen siphoning done with a tube long enough that you have a loop below the top, but you can still keep the suction end above the tank. Fluid stops at the tank level, so you can suck 'til it gets there, stop, and put the end in the container, and drain away when the container is lowered beneath the tank. My explainerator isn't working too well today. Something to do with patios and sunshine always makes me confused!

 

I replaced everything including rebuilding the master cylinder, so I started with a completely dry system. I used the same method K-moe described and was finished in about 15 minutes. I started with the left caliper and pumped in fluid until I got fluid in the master cylinder. Then did the right cylinder--slowly--until all the air was pushed out through the master cylinder. Since I had rebuilt the master cylinder I lightly squeezed the brake lever several times to get any trapped air out. Even though I had good hard brakes, I bled them normally just to be sure I didn't have any air in the calipers--and I didn't. 15 minutes and I was done and riding.

 

I've done it that way too. The real danger isn't the fuel so much as the fuel vapor. I'm asthmatic, and don't take chances with my lungs anymore.

 

Never even CONSIDERED the vapors. I guess its good to talk these things through. Enough brian damage as it is! But wouldn't your "blowing" method (I'll call it the pressure method from now on, I swear!) expose you to the vapors that have built up in the tank? Either way, I will use the pump I bought, for gas at least! Seen too many mouthfuls in my life!

 

Positive pressure directed away from my lungs, so no. Breathe in before, breathe out during, pull away with lips closed (great visual huh).

 

Due to your avatar, I'm picturing Jeff Bridges giving that advice. Strangely sexxxy. I need to grow up.

 

I failed to do that part once as a teenager trying to get a boat to start (don't ask me why), nearly passed out from inhaling the fumes and the severe burning feeling in the lungs - never tried it again and never will.