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Old Apr 26th 2017, 11:48 PM   #1
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Lightbulb Some more dieting on the Rear Brake Reservoir

Been off work recovering from some surgery and when my wife is not giving me jobs I sneak away to muck around on the bike.

I previously had some clear Tygon 2375 tubing on my rear brake line but melted it in a dyno session a couple years ago. Always wanted to put it back on.

Did some research and found that Saint Gobain also make LP1500 which is more suited to purpose and has a higher maximum recommended operating temperature.

2375 = 130 deg F or 54 deg C

LP1500 = 185 deg F or 85 deg C

If I had just placed some temporary shielding over the tube while the bike was on the dyno it would have been fine. I did not find any problems when riding the bike and there was normal airflow.

Even with the higher heat rating the LP1500 should be shielded on the dyno.

So played around for a few hours today and this is what I came up with. Saving in weight is 25 grams. I like the SBK look though. I used a couple Ti bolts. 1 x 7mm to seal the end, 1 x M6 I already had fitted to secure the tank and a little M3 to attach the CF on one side. I think the next stage is to make a small CF shield to run along the hose between the hose and the exhaust.

I have some more of this tubing left over so if anyone wants some PM me. I can sell you enough to do clutch, front brake, rear brake, on two bikes for the price you pay for the lesser grade 2375 for just clutch and F brake on one bike.
Attached Thumbnails
Some more dieting on the Rear Brake Reservoir-img_2457.jpg   Some more dieting on the Rear Brake Reservoir-img_2456.jpg  
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Last edited by bradp51; Apr 26th 2017 at 11:51 PM. Reason: added Photo
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Old Apr 27th 2017, 03:35 AM   #2
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I wonder what type or grade is the clear tubing that Brembo sells with their MCs. That's what I have.
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Old Apr 27th 2017, 04:21 AM   #3
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Originally Posted by youngR View Post
I wonder what type or grade is the clear tubing that Brembo sells with their MCs. That's what I have.
Saint-Gobain is the parent company based in Akron Ohio. Tygon is just one of their many products. Because a lot of their stuff is used in the food industry and medical applications they mark each product along the length with the product code about every 6 inches. So I guess if made by SG then it would have the code written on it. There is also a LP1200 for instance.

When I first bought clear tubing years ago from a bike shop in California, they advertised it as "Brembo tubing". I think they still do. But as far as I am aware Brembo do not make clear tubing. I once sent Brembo an email asking about this but never got a reply. If Brembo supply clear tubing in a kit, I guess they get it from another supplier other than SG.

I got some clear tubing once supplied with some Gilles clip ons and it was rubbish. It weeped brake fluid after a couple of days. I will see if I can find the pic of it I took. Ok found the pic and have put it in. You can see by the date this was in March 2013. This tube was supplied by Gilles products from Germany. You can see there is clear tube and then there is clear tube. This was a miserable failure and they replaced with standard black lines. I then later ended up buying the one from the bike shop in California advertised as "Brembo". When that one ended up melting on the dyno I called the shop and said how could Brembo tubing fail like that. Their ad at the time said as used by WSBK. They then said "Oh we never said it was made by Brembo" But it fits Brembo stuff. Thats when I wrote to Brembo, but got no reply. Sorry for the long answer. The tubing in the pic and the tubing I got from the bike shop never had any markings. The stuff I got from the bike shop in Los Angeles worked fine on clutch and brake just got too hot on the dyno.

Going for a spin tomorrow so will let you know how this stuff goes. I am pretty confident with it. I think the only real way to know what you have is to contact the seller and ask, otherwise without markings on the tube if could be from various places. Thats not to say its no good. Just probably not made by Saint-Gobain. I am sure it will be fine.
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Some more dieting on the Rear Brake Reservoir-dsc01177.jpg  
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Last edited by bradp51; Apr 27th 2017 at 04:24 AM. Reason: Typo
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Old Apr 27th 2017, 05:17 AM   #4
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I did this to my Aprilia Shiver build back in 2010. It eventually always leaked.
Attached Thumbnails
Some more dieting on the Rear Brake Reservoir-img_0887.jpg   Some more dieting on the Rear Brake Reservoir-img_0888.jpg   Some more dieting on the Rear Brake Reservoir-img_3945.jpg  
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Old Apr 29th 2017, 06:39 AM   #5
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Originally Posted by ryanfavro View Post
I did this to my Aprilia Shiver build back in 2010. It eventually always leaked.
I have never had any leaking problems. I took the bike out for 40 minutes today on my local "test" track out in the country. Allows for some pretty good speeds and I gave the rear brake a hard time. I stopped and checked 20 mins out and then when I got back. I did not detect any leaking. I have had clear tubing on the front brake and clutch now for over 3 years and never a leak.

Perhaps your clamps or the inner diameter of the tube you were using was not quite right.
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Old Apr 29th 2017, 12:07 PM   #6
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Originally Posted by youngR View Post
I wonder what type or grade is the clear tubing that Brembo sells with their MCs. That's what I have.
From what I know the "Brembo clear tubing kit" is Tygon tubing.

I just ordered 10ft of 2375 6mm tubing...
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Old Apr 29th 2017, 02:48 PM   #7
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If it is it will have it clearly written on it
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Old Apr 29th 2017, 02:56 PM   #8
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Or just get rid of it all together.
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Some more dieting on the Rear Brake Reservoir-img_0874.jpg   Some more dieting on the Rear Brake Reservoir-img_2610.jpg  
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Old Apr 29th 2017, 06:40 PM   #9
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Transparent Tubing for Brake Reservoirs (5mm) - OPPRACING Products

Item Summary

Used to connect reservoirs to master cylinders
Designed to prevent brake fluid evaporation
As used by MotoGP, World Superbike and AMA SBK heroes
Price/Quantity is per foot (12" inches or 30cm approx)
Does not Sweat, Discolor, or Leak. Tested ! 100%
Interal Diameter ID: 4.8mm or 3/16 inch
Outside Diamter OD: 8.0mm or 5/16 inch
Wall thickness 1.6mm or 1/16 inch
About the Product

Used to connect reservoirs to master cylinders
Designed to prevent brake fluid evaporation
As used by MotoGP, World Superbike and AMA SBK heroes
Price/Quantity is per foot (12" inches or 30cm approx)
Does not Sweat, Discolor, or Leak. Tested ! 100%
Interal Diameter ID: 4.8mm or 3/16 inch
Outside Diamter OD: 8.0mm or 5/16 inch
Wall thickness 1.6mm or 1/16 inch
----------
I got one of these type.
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Old Apr 30th 2017, 04:11 AM   #10
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Originally Posted by endodoc View Post
Or just get rid of it all together.
Pretty good for the track. But for me riding on the road and not changing after every ride it is handy to be able to see if there is fluid in there (in the clear hose I mean.)

What does one of those cost Ed ?
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