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Thread: V-Cycle runabout Foot brake to handbrake

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    Default V-Cycle runabout Foot brake to handbrake

    This is my first post, I found this site after purchasing a runabout a few weeks ago.

    I had a bike wreck that left me paralyzed at the t5.

    The trike is now automatic so the only thing to do is fit the foot brake to a handbrake operation.

    Anyone have a idea? Pictures maybe on how this has been done? Thanks.
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    Welcome to the forum. This subject has come up regularly and there are tidbits of information scattered in the various forums. Here's an example: https://www.triketalk.com/forum/thre...eas-on-braking

    I don't think that there are any companies that will have an out of the box solution for you as this is a high liability/low volume market. One recommendation that I will advance is that no matter which type of rear brakes you have, or end up using, keep the mechanical e-brake function. This way you will always have backup solution if your handlebar operated rear brake solution goes South on you. A standard VW e-brake lever placed where you can yank up on it in an emergency might come in handy.

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    Shannon ' Welcome to Trike Talk 👌👍📞
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    Maybe you could put the same basic setup you have in your car. That brake pedal is pretty much out in the open. I think you would have good leverage with the push bar. I don't think it would be really difficult to do,and you maintain a seperate front brake.

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    welcome aboard Shannon. I would suggest that you find a good local independent motorcycle repair shop. They should be able to rig a handlebar master cylinder to the rear brakes. You only have the rears to make work so it should not be very difficult.
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    A few technical things to know.

    Automotive brakes/master cyls move or displace a lot more volume. The raw psi in the brake lines is probably comparable.

    I have seen a motorcycle handlebar master cyl work with vw automotive brakes.........barely.

    First is finding a motorcycle hyd lever that has an unusually large bore (displacement).

    Second is having the car brakes in perfect condition and keeping them that way.

    There is no room for wear or mis-adjustment.

    Now..... let me put down what I would do.

    I would use the automotive master cyl and a brake vacuum booster. Then operate it by a cable and lever system.

    Power Brakes.jpg

    But of course I am not afraid of making things from scratch and this would take a lot of custom one off work to pull off.

    But If you have the resources look into it.

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    300+ Posts LarryA's Avatar
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    looks like it will work great.....vac res and mc can be located anywhere a cable can be ran, also easy to make a new ratio bar if a ratio change needed. wondering if this setup could be used for a power assisted clutch?? maybe a cam/ratio bar to spread out the clutch release and apply portion of the clutch travel?

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    Rex, I have a question

    Are you ( in your drawing) using clevis joints and pins or heim joints?
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    Clutch.....Yes

    This idea was originally conceived with clutch in mind. Would work same clutch or brake.

    Yes....if you wanted a variable ratio action you could make the double jointed knuckle set up like you see on a soft tail harley or a dirt bike swing arm (scaled down of course)

    And....this was just a sketch of an idea. It is not to scale and no details are engineered out.

    Venhill makes good cable kits.

    McMaster for clevis and bushings.

    Scap yard for a booster (servo) can.

    A dune buggy single master cyl.

    Then hand make all the other parts to make it fit together.

    Like I said....I have not engineered it all the way out. Just tossing ideas. If anyone wants do it then go for it.

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    Nice idea. I would have some questions about if the VW engine could generate enough vacuum volume (especially if cammed, carbed, or turboed) to be dependable. Also if engine quits, brakes/clutch quits. I've thought about maybe using an electric power brake master cylinder something like this from a Lexus LS460: https://www.ebay.com/itm/2007-2012-L...LH_TitleDesc=0

    That way as long as you have battery you have brake assist.

    As for clutch assist I've thought about using something like this hydraulic assist pump from a Mazda 5: https://www.ebay.com/itm/04-05-06-07...ring+pump.TRS0

    Just my musings on the systems and applications. Nothing engineered or planned out.

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