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Buell Motorcycle Forum » Big, Bad & Dirty (Buell XB12X Ulysses Adventure Board) » BB&D Archives » Archive through July 05, 2009 » Brake reservoir relocation « Previous Next »

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Snojet
Posted on Monday, June 22, 2009 - 09:52 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Okay, I’ve never liked the placement of the rear brake reservoir (in the path of the hot rear cylinder/fan exhaust). I’ve seen on this site various ways to relocate the reservoir, here’s what I’ve done. First, I looked through my scrounge drawers (many years of accumilating)and found this bracket/piece of metal (have no idea where it came from). I am like a packrat when it comes to any type of hardware or the like and I save it. It almost appears to me like it was made from Buell to be used for this reservoir mounting.
I removed the battery, located the “bracket” and used an awl to poke a pilot hole through the seat pan. Next was the drilling out of the pilot hole and securing with the screw nut assy. To note, the scrounged “bracket” had a dowel/guide pin of-sorts that was next to the hole for the screw assy. I just used the awl to poke through the seat so the guide pin would fit into the seat pan. That is like an anti-rotation function of the “bracket”. Lastly, using fiber locking nuts I secured the whole thing and the relocation is now complete.
At a later time I will place some type of heat reflecting tape/ducting to route the fan exhaust out the right/left side and bottom of the seat pan where the brake reservoir used to live. Getting tired of the hot-butt syndrome!!! Thought I would share…
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Armymedic
Posted on Tuesday, June 23, 2009 - 12:28 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Now all that heat is REALLY gonna pour onto your leg! : )
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Slaughter
Posted on Tuesday, June 23, 2009 - 12:53 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Does it clear the ground in a right side tip over?
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Hughlysses
Posted on Tuesday, June 23, 2009 - 05:02 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Snojet- I did something very similar:



This mod certainly provides more room for air to get out from under the seat.
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Ratbuell
Posted on Tuesday, June 23, 2009 - 07:50 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Hmmm....something to consider... I'm guessing it clears a suspension-compressed swingarm/fender/tire assembly? Nice mod. Something *else* for me to worry about, LOL.
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Snojet
Posted on Tuesday, June 23, 2009 - 08:19 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Armymedic -- And yes you are right. The heat is pretty rough. Interim solution is to hang the leg out just a little more.

Slaughter -- As for the right/side tip over. I really don't know. Hope the reservoir clears, more like I hope the tip-over just doesn't happen.

Hughlysses -- Good work, your mod looks good.

Ratbuell -- No clearance problems with any of the suspension. Easy mod, gives you something to do. Like you probably really need it, right?
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Hughlysses
Posted on Tuesday, June 23, 2009 - 09:58 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Snojet- the 08/09 heat deflectors cure that problem pretty well. They keep the hot air from jetting out against the sides of your legs.

Ratbuell- My bracket had slight contact with the swingarm under full compression when I originally installed it. It would scrape on the edge of the swingarm just to the left of the socket head cap screw above the footpeg support in the photo above. I had to tweak my bracket slightly to provide clearance. It has a slight "S" curve when viewed from above.
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Thunderbox
Posted on Tuesday, June 23, 2009 - 10:55 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I am wondering what the problem is with the hot air warming the brake fluid up a little? In a car they put the master cylinder right in the engine compartment and I have never seen a problem with heat there. And under hood temps can sometimes be pretty bad.

(Message edited by thunderbox on June 23, 2009)
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Hughlysses
Posted on Tuesday, June 23, 2009 - 11:20 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I didn't view hot brake fluid as a problem. What I saw was a ~3" diameter cylinder blocking much of the airflow from under the seat out of the opening on that side. Here's the post on my mods:

http://www.badweatherbikers.com/cgibin/discus/show .cgi?tpc=142838&post=941497#POST941497

You can see that moving the reservoir provides a MUCH bigger path for the air to flow out from under the seat. Making it easier for the air to move lets the fan run less (better airflow with fan on or off).
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Od_cleaver
Posted on Wednesday, June 24, 2009 - 11:26 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Thunderbox,

I would not worry about the brake fluid temperature rise.

Think of the rise in temperature of the fluid in the caliper when you get on your brakes. This will greatly exceed the reservoir temperature unless you mount the reservoir on the exhaust.
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