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@kilgore_trout avatar
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Looking for thoughts from the crowd on routing a brake line from a handlebar mounted master cylinder, through the headset, and down the column on a VBB.

I want to do a custom stainless hose, but I'm trying to wrap my head around the bends needed inside the headset to get around the throttle lever, headlight, and speedo. I'm using a SIP electronic speedo, so at least I don't have the original speedo cable to work around. I plan on routing straight into the right-side of the headset between the throttle lever and the headlight, so the hose would have to take a 90 degree bend back to the column and then 90 degrees down it.

My new thought is to mount a rigid line from the cylinder into the headset and with the bend to the mouth of the column, where I can connect to the braided steel line for the rest of the journey down.

Anyone see drawbacks to this, or would it make more sense to just do end-to-end braided line and deal with the twists bends inside the headset? I can see both working, but maybe someone's worked through this before.
@safis avatar
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Ossessionato
1979 P150X, 1983 P200E, 1987 PK125XL Elestart, 1988 T5, 1995 PX200E, 2011 Yamaha Fazer 600 S2
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Location: Veria, Greece
 
Ossessionato
@safis avatar
1979 P150X, 1983 P200E, 1987 PK125XL Elestart, 1988 T5, 1995 PX200E, 2011 Yamaha Fazer 600 S2
Joined: UTC
Posts: 4240
Location: Veria, Greece
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Although not a VBB I routed it like this on a Euro 50 Special...
Forum member supplied image with no explanatory text
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parallelogramerist
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parallelogramerist
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Forget about using a ridged hard line section. All it means is more complications, another connection, and more possibilities of a potential leak. Yes, the PX disc did have a short hardline under the headset that contoured over the top of the throttle tube. For all other disc brake kit installs, it's waaaaay easier (and better) to use a braided hydro line from end to end. And that's goes the same for every single vintage vespa and lambretta.

I'll either use Aeroquip or Speigler brake lines. The Aeroquip can be more challenging because you have to cut the braided stainless line and then thread it into a ferrule assembly. Be careful to not prick your finger with the stainless sheathing. The Speigler lines are custom cut to length, so you have to make sure you get your measurements correct.

I figure out which brake line banjo fittings that i want to use and install them first. Then from there i figure out the brake line routing. After that i measure how long the line needs to be. I usually error on the side of making the length about 1/2" longer than what my actual measurements.

Here are some pics of my brake line routings.
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Forum member supplied image with no explanatory text
Forum member supplied image with no explanatory text
Forum member supplied image with no explanatory text
Forum member supplied image with no explanatory text
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OP
@kilgore_trout avatar
UTC

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@kilgore_trout avatar
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I appreciate all the responses! Definitely helpful to see different examples, and even on the split headset solutions it's good to visualize it all.
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