Hydraulic Conversion Option for Dual Pull Brake Lever

[Fabian]

It's about time!

 

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It's about time!

The Hope V-Twin is fairly expensive and really isn't a dual pull adapter. You would still need a dual-pull cable lever.

Why not purchase a hydraulic cable splitter or an extra-long banjo bolt and go completely hydraulic? You can dial in the bias with different rotor sizes. 180mm front and 140mm rear should get you to around 65/35 bias.

I am going with a fully hydraulic scooter brake system with "ABS" bottles on my XR-80 build. These blow off excess pressure before causing a wheel to lockup. It seems that there would be less maintenance with a purely hydraulic system.

 

[Fabian]

The Hope V-Twin is fairly expensive

Yes it is, and it's the perfect solution with regards to a cable operated dual pull brake lever.

Why not purchase a hydraulic cable splitter or an extra-long banjo bolt and go completely hydraulic?

Because the master cylinder for hydraulic (bicycle) brakes is not designed to actuate two brake calipers; causing a spongy feel at the brake lever if trying to move twice the fluid volume.

 

[flashstar]

Because the master cylinder for hydraulic (bicycle) brakes is not designed to actuate two brake calipers; causing a spongy feel at the brake lever if trying to move twice the fluid volume.

If you purchase a high-end master cylinder, especially with adjustable throw, this is not an issue. The smaller piston area actually helps improve modulation and reduces throw effort.

You can also always purchase a scooter master cylinder (~$40) and grab compatible brake lines.

See this brake bias calculator. It is designed for cars but the principles are the same.

http://www.tceperformanceproducts.com/bias-calculator/