Brake Line Extension Piece

[Oldie]

Hoping to pull the bars back on my F800GT without stretching the brake line and wondered if there's a simple low cost solution using an extension to the existing fitting. I had a look around but, to be honest, I'm not sure what I should be looking for All other cables will be fine.

Here's a pic of the current set up.

https://lh3.googleusercontent.com/-K_LTAst5j60/VneeR5AiOkI/AAAAAAAAFEg/iRFEXYgui_I/s800-Ic42/IMG_20151221_063147314%25255B1%25255D.jpg

[Oldie]

Something like this from the States might be what I need although I was hoping for a fixed, say, 2" connector, rather than an extra piece of brake hose.

Trouble is, can't seem to find UK suppliers of either option.

https://lh3.googleusercontent.com/-xBDcFlYc6x0/Vnespib_YkI/AAAAAAAAFFA/5NGQ9gDf53Q/s800-Ic42/f800st_line_extension.jpg

[Rogerborg]

Have you had a look at where the brake line runs? If it's like my GS, it'll run back to the ABS unit, not straight down to the brakes. Do you actually need to extend it?
____________________
Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike

[Oldie]

The GT has a short straight cable that runs from the bars to a junction box fixed to bottom yolk. Unfortunately there is only room for a very small amount of re-positioning using an angle bracket (which I previously installed for 20mm risers) but I've used up all the "slack" putting 2" Rox risers on. They work fine height-wise, but with minimal pull back, so I need an extra bit of play and extending the brake line is almost certainly the only option.

[G]

I'd have thought the 'simple low cost' solution would be just to replace it with a longer one?

Get on ebay and I expect you can find longer ones second hand for not much.

[Oldie]

I did think about replacing the cable but I'd prefer not to have to bleed the BMW abs system. I reckon that an extension could go on without bleeding if I take the front caliper off an get the pistons out to their max. Maybe I'm wrong on that point.

[Rogerborg]

If it's the same system as on the 800 GSes, bleeding shouldn't be an issue.

Unlike on older BMW systems which appear to be a right sod to do, the ABS circuit is sealed off from the normal lines. You can drain/bleed/flush the lines right through and the fluid in the ABS part won't be disturbed.

The Motorrad Monkeys have a gadget that will hold the ABS valve open so that you can flush / bleed that circuit at the same time, but you don't need to.

Ostensibly you can renew the ABS fluid by renewing the fluid in the normal line then triggering the ABS a few times to open the valve, then renewing again. I'm not 100% convinced that will be completely effective, but unless you actually want to renew that fluid it's not an issue - I drained and renewed the front circuit on my GS without any problems or trickery.
____________________
Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike

[Oldie]

I had a brake fluid change recently so I can safely ignore the ABS for now. I did suspect that the bleeding process had been simplified and that would certainly make life easier if I simply install a longer brake line. I was working on the belief that an extension piece would be cheaper, hence the reason that Verholen etc include these in riser kits, rather than a longer brake hose.

[bugeye_bob]

Id do it properly, any joint is just another place for a leak to spring while out,
You will have to bleed the brakes to fit the small pipe and jointer so you may as well do it properly in one go.

[Pete.]

[Hahadumball]

[iooi]

[Copycat73]

[Rogerborg]

Add an extension carefully to the top of the line would result in minimal fluid loss and all the air would start near the reservoir. Pretty much trivial to reverse bleed out, and an interesting suggestion given the reasonable concerns about bleeding past the ABS unit.
____________________
Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike

[Vincent]

As rogerborg says, if you do it right, it won't need much bleeding.
Something I did, when I fitted higher bars.....and I know this will raise eyebrows of the more conventional, is to saw the stop off the master cylinder so I could change the angle of the hose. I only needed about an extra inch and been able to change the angle of the banjo union sorted it nicely. It does mean the hose could get knocked in an accident and there's a chance you wouldn't notice it and ride off and kill yourself, (probably fixable with some locking wire if you're that worried)...but I like to live dangerously sometimes.
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Space Is Deep

[Rogerborg]

That's very ghetto - I love it.

I've never been sure of the point of those stops on M/Cs. Anyone?
____________________
Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike

[Pete.]

[Vincent]

The stops may be there to conform to safety regs.
When I did mine, I didn't need to rebleed the brakes, (can be a pain on the VFR), as I only loosened it a tiny amount ....just enough to move the banjo but not let any air in.
You can sometimes gain an extra inch or two on the hose by alternative routing around the forks.
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Space Is Deep

[Oldie]

Looks like there are a couple of options out there. Verholen or Wunderlich supply a 2" metal extension piece with their riser kits but don't sell them separately but a bit of digging should turn up something.

[Vincent]

Daytona do something like the one above:-

https://www.j-mart.biz/j-parts/index.php?main_page=product_info&cPath=1_15_1815&products_id=4631

CMS sell 'em too:-

https://www.cmsnl.com/products/brake-hose-ex-100mm_68758/#.VnnF31LzV80
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Space Is Deep

[Oldie]

Thanks Vincent - that just might do the trick