Topic: Vacuum bleeding is worse than the old fashioned way

[eigenvector]

I just replaced by brake lines with those that I got from Slingshot, and first - they're a hell of a lot better than the original rubbers.  2nd, since I totally drained the system, I figured - "I'll use a vacuum bleeder to speed up the process of recharging the system".

Wrong.  I about wore out my arm pumping that vacuum bleeder trying to get the air from the system.  I gave up, and tried it the traditional way - much faster and frankly a lot better results.  Brake fluid is completely replaced and no air in the system to speak of.  Truth - I expect a little bit of air to dribble out over the course of the next few days, but I'd probably still be trying to get the brakes bled had I relied on that bleeder.

[sammermpc]

I'm pretty happy with my speed bleeders. I've been thinking about getting a of lines from Slingshot too. Hope it'll make a big difference.

[Johnie]

I have great results with my Mighty Vac.

[Muckinfuss]

Might Vac here....mine runs from a compressor line tho.....I can't talk to the manual pump types.  Mercedes Benz has been using them in their dealer shops exclusively for years for all fluids....not just brake lines.

[Davez134]

I have a hand pump mighty vac. Was super easy for me. Maybe you had a tiny air leak and it wasn't holding a vacuum?

[martin_uk]

I normally use a large syringe to suck fluid through bleed nipple, seems to work well as fluid not agitated as much as pumping from master cylinder.

It also confirms the pressure release port is clear in master cylinder.

[Don R]

I just had a heck of a time bleeding a goldwing, the speed bleeders handled it easily. the speed seems to help force the air down. I had also tried pumping the calipers against the old thin pads then pushing the pistons back to move fluid up back into the M/C, that didn't help much.

[Powderman]

It's a Mityvac, not Mighty Vac. I have had one for decades and I've never had it work as well as normal bleeding process. I use Russell Speed Bleeders that work great. I sold a couple of Mityvacs when I worked at O'Reilly Auto Parts. Every one I sold was returned a few days later because the customer said it sucked.

[chewbacca5000]

I got this down to a science.  The easiest way is to disconnect the master cylinder fill the caliper 2/3 full with brake fluid and gently push the piston back in.  As you push the piston in it pushes the air out. 

Next put down get some towels and cover anything you don't want brake fluid on.  Place thumb over mc hole and gently pull lever.  The extra air will come out.

Reconnect brake hole with banjo bolt.  Brake lever feel will be fairly firm.  A quick bleed and your done.

[Davez134]

Well, however you spell it, mine worked great both times. I must have been lucky.

[Airborne 82nd]

It's a Mityvac, not Mighty Vac. I have had one for decades and I've never had it work as well as normal bleeding process. I use Russell Speed Bleeders that work great. I sold a couple of Mityvacs when I worked at O'Reilly Auto Parts. Every one I sold was returned a few days later because the custmomer said it sucked.

Isn't that what they are suppose to do 
I could not resist. Is it custmomer or customer.

[arogers88]

I fill a syringe with fluid and attach a hose to the end of it, then I attach the other end of the hose to the bleeder nipple and push the fluid slowly from the bottom up.

Seems to work for me.

[Powderman]

It's a Mityvac, not Mighty Vac. I have had one for decades and I've never had it work as well as normal bleeding process. I use Russell Speed Bleeders that work great. I sold a couple of Mityvacs when I worked at O'Reilly Auto Parts. Every one I sold was returned a few days later because the custmomer said it sucked.

Isn't that what they are suppose to do 
I could not resist. Is it custmomer or customer.

Good one. I have to turn my spellcheck off. It's been way off lately. I live in Ga. so it could be both here. 
I'll fix the post.

[70CB750]

I normally use a large syringe to suck fluid through bleed nipple, seems to work well as fluid not agitated as much as pumping from master cylinder.

It also confirms the pressure release port is clear in master cylinder.

Syringe, thats what I use too.

[Johnie]

Don I used the Mighty Vac on my Wing too. Works great....you guys can send your junky Mighty Vacs to me.

[seanbarney41]

For whatever unknown reason, my Mityvac seems to work great on cars, but is totally useless, if not harmful, to bikes.

[Johnie]

Used my Mittie Vac on all my bike with 100% success. Not sure what the issues are. If you have problems with air seeping back up the bleed valve creating tiny bubbles just wrap some pipe tape on the thread.

[flybox1]

+2 for speed bleeders.

[Airborne 82nd]

Used my Mittie Vac on all my bike with 100% success. Not sure what the issues are. If you have problems with air seeping back up the bleed valve creating tiny bubbles just wrap some pipe tape on the thread.

Just to add to this I have seen air get in between the bleeder and the Mityvac hose. But a small  hose clamp will fix that.

[Johnie]

You know, I keep hearing about those speed bleeders. I have to give it a try sometime. Just had no reason to try one.

[Stev-o]

You know, I keep hearing about those speed bleeders.

I put one on my K4 after all the good reviews heard around here.  Does make bleeding much easier.

http://www.ebay.com/itm/Honda-Speed-Bleeder-CB750-Models-K0-K6-1969-1976-/271805211675?pt=Motorcycles_Parts_Accessories&hash=item3f48da641b&vxp=mtr