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What can I replace rear master cylinder hose with?

  • Thread starter Thread starter Anonymous
  • Start date Start date
A

Anonymous

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The one on my 1100 has gotten crusty and is leaking. Can I just go ahead and use some Good Year gas line? The molded ones are quite pricey, about 15USD I believe...

Cheers, Steve
 
Just me Steve, but when it comes to brake parts, I wouldn't go cheep.
Buy the stock replacement parts for it if at all possible.
 
I agree completely. I'm just asking because I've noticed that our brake systems use rubber hoses, o-rings and lid seals. Seeing as the hose isn't pressurized my main concerns are contamination and longevity.

Steve
 
As long as it is fuel and oil resistant hose it should work fine. You are installing it from the cylinder to the resivoir so there is no pressure to worry about. Personally I would use fuel inj hose, just make sure it does not kink
 
srivett said:
I agree completely. I'm just asking because I've noticed that our brake systems use rubber hoses, o-rings and lid seals. Seeing as the hose isn't pressurized my main concerns are contamination and longevity.

Steve
Click to expand...


It only looks like rubber, Steve. Pure rubber would perish very quickly as petroleum products tend to dissolve it.

They are usually made of neoprene, or a similar product that is non-reactive.

Hydraulic fluids are not the same as gasoline, and can be both corrosive to paints, etc. but also hoses.

Brakes are vital to you, and your bike, so take the extra time and effort to be certain what you use is good for that purpose.

Identify the product, then ask the manufacturer directly to tell you if it will withstand hydraulic brake fluid.
 
You might want to take a small piece of the hose and put it in a baby food jar then top it up with brake fluid. Leave it a few days and then dig a finger nail into it. If it has changed consistancy at all, don't use it because it will deslove particles into your braking system.
You can buy "brake hose" by the foot at Canadian Tire.
Probably safer.
 
see if you have a hydraulic shop in the phone book or a auto parts store that can make brake lines. thay will have the right stuff to get you going.

on a bike you realy dont want to be cheep on any parts that can be a life saver. its better to be cheep on the looks than the parts that make it go and stop.
 
I'm gonna go out next week and do some snooping around at the bike shop. The line must be pretty easy to come by as the front remote reservoir is the first thing to get ripped off the newer bikes when they get high sided. I know kevlar works as that's what is inside of my braided lines but where can I get that in a larger size?

As for safety, I'm not cheap unless I'm certain of what I'm doing. I just hope there isn't some special rubber tree out there used to make brake line. :lol:

Cheers, Steve
 
Personally, I would use the spare hose off the complete rear master cylinder I have in a box somewhere...Some cars had remote systems similar so muct be hose around.
 
Well, I just happened to find my answer today. Some schoolmates were putting together a race car in the shop and it had a custom brake set up. It was supplied with the following, I didn't see what brand equipment it came with though.

As per the side of the hose: Gates Adaptaflex Multipurpose WP CS 060903 X200 It looks like gas line and probably is. :wink:

Cheers, Steve
 
Thick walled fuel line grade hose or brake line grade hose is fine, it is just a resevoir line there is no pressure. It will be far superior to any 20 year old stock part for sure. Brake fluid eats paint, not rubber.


Dr. Dre
 
Steve this isn't rocket science. Get a Dennis Kirk 2004 Metric Bike catalog free by going to Denniskirk.com and look on pages 557 through 559. You can order the line and banjo connections and make your own lines if you can't get an original from Suzuki. By all means use hydraulic lines!! Nothing else will come close to working properly and brakes are the most important part of your bike. Do it right! 8O
 
if mine ever needed to be done..... id break out the flaring tools, AN fittings, and the appropriate alluminum tubing, and make one. but thats just me and I happen to have access to all that stuff, if I didn't then id just replace it with whatever grade hosing is required as everyone else above has said.

hrmm, thinking of alluminum hardlines, I should look at my bike some more, maybe i'll put a hardline most of the way to the rear brake and just a short flex line at the master cyl. do to the swing arm pivot. only if the brake line needed to be replaced though
 
I wouldn't use hard line too much vibration on motorcycle
 
Harley's have hard lines part way down the front and off of the handle bars. :) I have already got a stainless braided line on my 400 that I put on myself so I'm well versed in that subject...it seems that people think I'm talking about the line to the caliper but I'm not.

Steve
 
SqDancerLynn1 said:
I wouldn't use hard line too much vibration on motorcycle
Click to expand...

and you think airplanes dont vibrate? mounting the lines to not have issues with vibrations is fairly simple. it was just an idea though, I do like the look of anodized AN fittings though :D
 
DON'T USE FUEL HOSE!!!

Trust me. Brake fluid will eat fuel hose in less than a week. I've done it before. It's not pretty, especially when your brakes fail in the rain coming off the freeway at 60+.
9 years ago, I had a '63 VW, that I had to replace the master cylinder in. The shop was out of brake hose, so I figured I'd use some fuel hose instead. The nice, 45 cents a foot, black nylon covered stuff. On Bugs, the brake resevoir is remoteley mounted in the trunk, and the MC itself is down near your foot, on the other side of the firewall. When it failed, it failed at the worst possible time. I ended up using the e-brake to stop, on the other side of the intersection. They had the right stuff when I went back. In my case, brake hose is designated for VW's as being colored blue, as opposed to black for fuel hose (I forgot what green is for, but it's something specific, vacuum I think).
You don't have that luxury on a bike. Get the right stuff, for sure.
 
srivett said:
It's the reservoir hose, not the brake line.

Steve
Click to expand...

OK now I'm confused, what is a reservoir hose? Brake fluid doesn't pass through it under pressure? If there is no pressure and it just drains into the master cylinder, silicone hose available at auto parts houses will work. It comes usually in black and bright colors but it is impervious to gas, oil or brake fluid.
 
Michael, this is the hose he is talking about.
brake.JPG
 
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