Rubber hose for brake fluid? - GS1100GK

[Guest]

Hello,

I am in the process of completely rebuilding the brakes on my 1982 GS1100GK and I am planning to replace the rubber hose that goes from the reservoir to the rear master cylinder.

I think my bike still has the original hose; some black particles were coming out of the hose when I drained it.
The OEM part does not seem to be available anymore.

Can I use ANY kind of fuel hose (rubber or plastic) or is there a risk of chemical damage? I am using DOT 4 brake fluid.

Thank you!

 

[1978GS750E]

NO! Brake fluid requires a certain type of hose. Fuel hose will not work! Try and find a "good" hydraulic shop (aka, The Parker Store) and they should have hose that is suitable for brake fluid.

Ron

 

[roeme]

Hello,

I am in the process of completely rebuilding the brakes on my 1982 GS1100GK and I am planning to replace the rubber hose that goes from the reservoir to the rear master cylinder.

I think my bike still has the original hose; some balck particles were coming out of the hose when I drained it.
The OEM part does not seem to be available anymore.

Can I use ANY kind of fuel hose (rubber or plastic) or is there a risk of chemical damage? I am using DOT 4 brake fluid.

Thank you!

Jesus NO! Any non-hydraulic hoses would burst, and any hose not suitable for brake fluid (that sh!t's aggressive) will break down over time, that means also breaking your bike and likely including you.

Edit: Only realized now you're referring to the hose between reservoir and master cylinder. While that part is not under pressure, it still must be certified for brake fluid.

 

[Steve]

Since you are already going through the effort of replacing it, why not go the extra mile and replace it with stainless?

It's actually just a stainless braid over a Teflon-lined hose, but the generic term is "stainless brake line".

.

 

[alke46]

How lucky we all are for this.

Take Steve's advice and replace all the brake lines with the SSB. That stands for stainless steel braided.

Our very own guru Mr. nessism has a thread on this very subject. Parts available from Earl's plumbing in So Cal. Very easy to make your own. Look it up.

 

[2BRacing]

The OP said that he wants to replace the hose from the reservoir to the rear master cylinder [ ...I am planning to replace the rubber hose that goes from the reservoir to the rear master cylinder.]

For that specific application the stainless steel braided hose will not work.

It is highly likely that that specific hose from just about any larger model Suzuki will be the same as the one on OP's GS1100GK. In fact, according to Partsoutlaw fiche for 1981 GS850G the part number for that hose (item number 18) is 51241-85X50 at a price of $23.19.
​

 

[roeme]

The OP said that he wants to replace the hose from the reservoir to the rear master cylinder [ ...I am planning to replace the rubber hose that goes from the reservoir to the rear master cylinder.]
(...)

Completely missed that under sleep deprivation. Updated my answer

 

[Steve]

Not sure if I can also blame sleep deprivation, but I missed that detail, too.

.

 

[Steve]

It is highly likely that that specific hose from just about any larger model Suzuki will be the same as the one on OP's GS1100GK. In fact, according to Partsoutlaw fiche for 1981 GS850G the part number for that hose (item number 18) is 51241-85X50 at a price of $23.19.
​

I just did this same search and came to the same result, but found something interesting along the way. The original part number is 69731-45300. A quick cross-reference search shows that this same part number is used on all four-cylinder shafties 850 and larger. My search also showed that the number that Ben (2BRacing) provided is the superceded part number. For some reason, the 1100GK parts fiche does not show the new number.

.

 

[Guest]

Thanks everyone, much appreciated!