rear brake reservoir - are these ok for road use ?

[barwel1992]

LINK (http://www.crescent-motorcycles.com/pages/shop/product_detail.aspx?pid=517)

is that ok for road use ? the diaphragm on my rear brake rez is knackered so need a new one but im wondering if i should just ditch it all together.

thanks

[jimmyb]

Just got a hrc one for my curvy off ebay, a few quid cheaper and just the same with a green tube. Cant see why they woundnt be ok for the road ;-]

[_Stretchie_]

Northwind has something like this, not sure if he made it himself. I remember seeing it at an AR years ago, possibly AR06??

[barwel1992]

hmm just looked at a few reviews of the HRC stuf and the tube sweat's brake fluid...

[jimmyb]

Not good :-[

[barwel1992]

i know i was just about to order it as well, im going to measure up the stock tube ID and see if i can find some PVC stuf that apparently dosn't sweat

[hardhat_harry]

No it doesn't!!!!!

We use them all the time and its fine.

I suggest the person who says it sweats brake fluid is not using "official" HRC stuff. I know the chinese copy the Brembo stuff alot.

Currently we have the HRC tube and stopper etc fitment to an SV, an LC, a TL1000 and 3 GSXR's never had 1 sweat yet.

hmm just looked at a few reviews of the HRC stuf and the tube sweat's brake fluid...

[petevtwin650]

I had a HRC one on my curvies. Yep they do sweat a bit, but work fine and a darn sight easier to top up and check than the curvy OEM reservoir.

[barwel1992]

No it doesn't!!!!!

We use them all the time and its fine.

I suggest the person who says it sweats brake fluid is not using "official" HRC stuff. I know the chinese copy the Brembo stuff alot.

Currently we have the HRC tube and stopper etc fitment to an SV, an LC, a TL1000 and 3 GSXR's never had 1 sweat yet.

i suggest you search google with HRC Rear Brake Reservoir Kit sweat and you will find lots and lots of people saying they do...

[yorkie_chris]

Because they are using some crap tubing, you want right tygon stuff which is brake fluid proof.

£18! Lol!

[flymo]

£18 quid for a piece of tube! You are seriously having a laugh.

I got 2 metres of suitable tubing for about £2 from my local car parts shop.......think I might start chopping it up and selling 'rear brake race res kits' on ebay for £17.50 ;-)

[barwel1992]

Because they are using some crap tubing, you want right tygon stuff which is brake fluid proof.

£18! Lol!

£18... :o

so the HRC kits are cr&p basically ?

apparently fuel line tubing is fine to use ?

[yorkie_chris]

so the HRC kits are cr&p basically ?

Not crap just bloody dear.

I'll send you a chunk of tygon 2075, a bolt and 3 cable ties for a fiver

[barwel1992]

Not crap just bloody dear.

I'll send you a chunk of tygon 2075, a bolt and 3 cable ties for a fiver

but its the HRC kits that are sweating

will the tygon stuf sweat ? (ps i use tygon in my mate water cooled pc ;) )

apparently the plug/cap need a small hole in it to breath as well or you need to leave a fair sized air gap

[yorkie_chris]

Tygon make lots of tube (http://www.usplastic.com/catalog/default.aspx?catid=864&parentcatid=856&clickid=popcorn), it is 2075 plasticiser free that you want. 5/16" id.

M8 bolt does not quite seal in the top there which gives vent you need.

[barwel1992]

cheers :)

[hardhat_harry]

You can't use fuel tube that does sweat.

I dont need to google "HRC brake tube sweat" I just need to look at my bikes and see that they are not sweating.

If its good enough for HRC its good enough for me.

Tis expensive though :)

[barwel1992]

fair enough but nearly every one else said that there HRC kits sweat

and YC that site is funny you select quantity of 1ft and then it makes you by 10ft lol $38 for some tube :o

i think i might pay you that fiver ;) how long would the tube be ?

[yorkie_chris]

6-8" or something like that.

Find a syringe somewhere too to fill it

[hardhat_harry]

eBay has the syringes you need

[yorkie_chris]

Helps having family in the medical profession :)

[barwel1992]

just brought a 100ml syringe

[Typhoon]

You don't want it to breathe. Its supposed to be air tight as its air that makes the fluid go off so to speak.

[yorkie_chris]

Aye you'd think so, but it's the rear, it's dead easy to change, and there has to be some way to make up for volume change otherwise your travel will get longer and longer as the pads wear.

[Typhoon]

See what you're saying but the amout of fluid that is actually displaced is minimal. No where near enough to rupture a seal etc.

[yorkie_chris]

Who said anything about blowing seals?

For example, simulate the action of wearing brake pads... push one pad back 1mm. Then seal the end of your reservoir. Now try apply the brake.
The tension in the tubing will not allow proper refill of the master cylinder.

This is reason stock setup has diaphragm on top of reservoir... it may be sealed but it is not a fixed volume.

[flymo]

whatever you do, dont fill with fluid right to the top with no air gap. I've had the rear brake tighten up under heat like that.

I normally part fill the tube, leaving a small airgap between top of the fluid and the bung (allen screw or similar) and then use a cable tie to seal the tube around the fasterner threads. Easy to spot the fluid level and top it up.

Better still, you could just use a rear brake res and be done with it :-)

[petevtwin650]

This on Ebay at the moment

http://cgi.ebay.co.uk/HONDA-HRC-RACE-BRAKE-KIT-RC30-DUCATI-YAMAHA-SUZUKI-/330449977267?cmd=ViewItem&pt=UK_Motorcycle_Parts&hash=item4cf05a7fb3

and this is what the seller says about sweating

http://i72.photobucket.com/albums/i184/petevtwin650/org%20tech/1org-5.jpg

[embee]

Conventional brake fluid systems usually use EPDM lined hose, which happens to be what most decent automotive water (coolant/heater) hose is. I recently ordered some Goodyear heater hose from fleabay (http://cgi.ebay.co.uk/GOODYEAR-8mm-5-16-Heater-Water-Coolant-hose-tube-pipe-/290136672719?cmd=ViewItem&pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item438d7e49cf) (for coolant, but would be fine for brake fluid). Nitrile/NBR lined hose typical of fuel/oil spec isn't suitable.

See Rubber compatibility (http://www.sealanddesign.com/category/2/O_Ring_Compounds/page/84/Rubber_Materials/cpage/62/Rubber_Materials.aspx)

[barwel1992]

^ cool,

YC is sending me some of his expensive stuf :D

[yorkie_chris]

I had a careful check of the tygon 2075 on mine, it is not sweating after a month or so of use

[barwel1992]

cool thanks

[DarrenSV650S]

Mine sweated a bit, but it wasn't a problem. The brake still worked fine. I just gave the tube a wipe every now and then

[dkid]

Holy thread resurection!!!

Tygon have replaced 2075 with 2375 for anyone interested....Just doing this on my RR