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Thread: Thumb Brake, winter project

  1. #1

    Thumb Brake, winter project

    And here it is!


    I wish! After talking with a few of you fine gentleman (and ladies) at the track, I have really been interested in the benefits of starting to use the rear brake more.

    I have tried it quite a few time, and fine the benefits really good for controlling the front end, but found it very tricky to use with my right foot.

    So, thumb brake it is! But am not going to spend $800+ on one, so thought I would have a go myself.

    I started looking at the designs that are on the market, and went from there!

    As we all have, there's a bag a old crashed parts in the corner of the shed, and thought there could be some good options.

    So I need something to clamp around the fork leg!



    It's a bit big, so time for some weight reduction.



    Offer the OEM rear master cylinder up, and adaptor plate time!







    Time to see how it looks on the bike!





    An old gear lever could work as a thumb lever!





    So at first it looks ok, tight, but we all like that!
    Time for some welding! Now my welding skills are between, low to average, but I have a Danny, this boy can weld.



    Flipped to the other side!





    This is the type of projects Danny does through his business, he's very good!



    Now at this point, all was looking OK, but after some more trial fitting the oem rear master was too big, and wouldn't work on full lock, so time for a rethink and time to look through the parts bin again.

    Rev 1.2.





    Trail fit.







    So, the project is making good progress, next step:
    Order new brake line.
    Workout and order new bearings.
    Change lever tip for better ergonomics for the thumb.

    Anyway just wanted to share my little winter shed project.






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    Last edited by Leezx10r; 09-07-2016 at 02:04 PM.

  2. #2
    Wow dude , mad project. Subscribed.

  3. #3
    misguided youth Little Mick's Avatar
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    Great stuff mate

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  4. #4
    Awesome engineering. Love it


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  5. #5
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    Are you getting rid of the foot pedal ?

  6. #6
    Moderator chubb's Avatar
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    Hmmm interesting

  7. #7
    Quote Originally Posted by stevem View Post
    Wow dude , mad project. Subscribed.
    Quote Originally Posted by Little Mick View Post
    Great stuff mate

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    Quote Originally Posted by Plumb View Post
    Awesome engineering. Love it
    Thanks guys! It's a work in progress, but am getting there.

    Quote Originally Posted by RIPPERTON View Post
    Are you getting rid of the foot pedal ?
    Yes the foot pedal has gone, but the way I have built it gives me the option to put everything back if I change my mind.


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  8. #8
    Admin Turbo's Avatar
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    This is totally badass!! Nice work, Lee!!
    A few strokes of genius in there, love seeing the thought process as it progresses.
    Keep the updates coming!!
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  9. #9
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    Back in 08, on my CBR1000RR I had a cable over hydraulic controlled by a twist grip on the left bar. The cable went down to the foot pedal.
    Worked but had to twist my wrist so far made it uncomfortable under heavy braking.

  10. #10
    That's fricken AWESOME!!! Love it! Top job mate, and thanks for sharing. Ingenious!
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  11. #11
    Quote Originally Posted by Sicko View Post
    This is totally badass!! Nice work, Lee!!
    A few strokes of genius in there, love seeing the though process as it progresses.
    Keep the updates coming!!
    Cheers Owen. Yeh, will keep the updates coming through mate, still trying to think of a good option on the bearings, but am sure I can work something out.

    Quote Originally Posted by RIPPERTON View Post
    Back in 08, on my CBR1000RR I had a cable over hydraulic controlled by a twist grip on the left bar. The cable went down to the foot pedal.
    Worked but had to twist my wrist so far made it uncomfortable under heavy braking.
    If would have been nice to have both options, but since I didn't really use it in the oem location, for my simple mind it was easier just to move it all.

    Quote Originally Posted by Marshy View Post
    That's fricken AWESOME!!! Love it! Top job mate, and thanks for sharing. Ingenious!
    Cheers Nick. I don't mind being the guinea pig to see if it will work.
    Plus as we all know, everything loves a build thread.



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  12. #12
    My brain always tries to convince me to do something like this, then it realises I am incapable. Now I can just watch what you do and pretend I am going to do the same.

    Looks the goods mate! I need a Danny for some projects. Is the Danny plug and play? Or is a build required beforehand? Is the Danny portable?

  13. #13
    Quote Originally Posted by zoidberg View Post
    My brain always tries to convince me to do something like this, then it realises I am incapable. Now I can just watch what you do and pretend I am going to do the same.

    Looks the goods mate! I need a Danny for some projects. Is the Danny plug and play? Or is a build required beforehand? Is the Danny portable?
    A "Danny" is a mythical creature, who moves with the changing winds! He has also been known to disappear in a cloud of argon.


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  14. #14
    Quote Originally Posted by Little Mick View Post
    Great stuff mate

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    Hope you're taking notes, I feel like ordering something...

  15. #15
    I going to do this to mine, but keeping the foot brake setup. You can get the proper setup from eBay UK cheapish if your prepared to wait a while, if you don't have a Danny handy. I was going to do it on my 600 as well but everywhere I set it up it hits something. Very frustrating.

  16. #16
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    If you run 2 master cylinders in the same circuit, the lower one will need its piston adjusted so far in that its compensating port is covered so when you apply pressure from the upper MC, it doesnt lust leak back out of the lower MC compensating port. You can also remove the reservoir from the lower MC.

  17. #17
    Quote Originally Posted by RIPPERTON View Post
    If you run 2 master cylinders in the same circuit, the lower one will need its piston adjusted so far in that its compensating port is covered so when you apply pressure from the upper MC, it doesnt lust leak back out of the lower MC compensating port. You can also remove the reservoir from the lower MC.
    Is this type of setup no good?image.jpeg

  18. #18
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    Quote Originally Posted by Slow bro View Post
    Is this type of setup no good?image.jpeg
    In this pic, the upper MC is flowing through the lower MC compensating port and it would have to be drilled out so it would flow more.
    Compensating ports are very small maybe 1.5mm diameter and that would slow down the action of the thumb brake.

  19. #19
    Quote Originally Posted by RIPPERTON View Post
    In this pic, the upper MC is flowing through the lower MC compensating port and it would have to be drilled out so it would flow more.
    Compensating ports are very small maybe 1.5mm diameter and that would slow down the action of the thumb brake.
    Thanks

  20. #20
    Bearings done, did a few little steps in the shed today, but that's about it until the brake line and other parts arrive!




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  21. #21
    Looking good

  22. #22
    I think I would be lost without my rear break pedal .

  23. #23
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    Quote Originally Posted by RIPPERTON View Post
    If you run 2 master cylinders in the same circuit, the lower one will need its piston adjusted so far in that its compensating port is covered so when you apply pressure from the upper MC, it doesnt lust leak back out of the lower MC compensating port. You can also remove the reservoir from the lower MC.
    Realised last night, piggybacking 2 banjos on the pressure side of the lower MC wont work because when you operate the lower MC the fluid will just piss out of the top MC reservoir so the setup Slow bro showed is the only way it would work.
    http://tarmactalk.com/forum/attachme...4&d=1467514254

  24. #24
    Senior Member Simmo's Avatar
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    That is seriously impressive. I would love to be able to do this but realistically would probably just cough up the $800.
    You know you will need a sticker on it like Dovi right?!


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  25. #25
    Quote Originally Posted by Simmo View Post
    That is seriously impressive. I would love to be able to do this but realistically would probably just cough up the $800.
    You know you will need a sticker on it like Dovi right?!


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    Your right I do need a sticker 119


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  26. #26
    Well that little project is all complete apart from testing on the track.
    New brake line arrived from Hel on Friday as did the new m10x1.00 banjo with bleed nipple and other little parts to finish off the project.
    Was a bugger to bleed, and probably didn't help with the line being 1550mm long!
    But it's all done, and the feel is great. Probably around 10-15mm of travel which feels good to me.
    Here is a few final pics all installed.






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  27. #27
    Quote Originally Posted by Leezx10r View Post
    Well that little project is all complete apart from testing on the track.
    New brake line arrived from Hel on Friday as did the new m10x1.00 banjo with bleed nipple and other little parts to finish off the project.
    Was a bugger to bleed, and probably didn't help with the line being 1550mm long!
    But it's all done, and the feel is great. Probably around 10-15mm of travel which feels good to me.
    Here is a few final pics all installed.






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    Nice one mate.


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  28. #28
    Admin Turbo's Avatar
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    Amazing work, Lee!! This is such a good mod, thanks for sharing.
    Can't wait to hear how you get on with it on track!
    Skywalker - 2017 BMW S1000RR FOZ/Unlimited/Bears Race Bike #62
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  29. #29
    Well done, hope it works well.

  30. #30
    Looks flipping amazing!!! Can't wait to see how you like it. I reckon the $800 version might be on my christmas list.....
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  31. #31
    that's a really good setup you have there .

  32. #32
    Thanks guys! There's going to be a bit of tweaking to get the levers/controls in the correct location, but there's a fair bit of adjustment.
    Keen to see how it goes on the track 🏻


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  33. #33
    Awesome Lee.

  34. #34
    Very cool!!! Nice work


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  35. #35
    Quote Originally Posted by Leezx10r View Post
    Well that little project is all complete apart from testing on the track.
    New brake line arrived from Hel on Friday as did the new m10x1.00 banjo with bleed nipple and other little parts to finish off the project.
    Was a bugger to bleed, and probably didn't help with the line being 1550mm long!
    But it's all done, and the feel is great. Probably around 10-15mm of travel which feels good to me.
    Here is a few final pics all installed.






    Sent from my iPhone using Tapatalk
    Great, now look what you've done too...


    But seriously, this is so awesome mate, I can't wait to hear how it goes. I don't have the skill to do this myself, and since (I'm assuming) your Danny is a one use item, I can't even borrow it to do some work to my bike.

    Might have to ask satan, santa? To get me one of the $800 jobbies for xmas too.

  36. #36

    Thumb Brake, winter project

    Quote Originally Posted by zoidberg View Post
    Great, now look what you've done too...


    But seriously, this is so awesome mate, I can't wait to hear how it goes. I don't have the skill to do this myself, and since (I'm assuming) your Danny is a one use item, I can't even borrow it to do some work to my bike.

    Might have to ask satan, santa? To get me one of the $800 jobbies for xmas too.
    Haha! Just do it, get it put on the Christmas list, but only if you've been a good boy! Second thoughts, best not to add anything to the Christmas list lol


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    Last edited by Leezx10r; 10-07-2016 at 04:41 PM.

  37. #37
    Quote Originally Posted by Leezx10r View Post
    Haha! Just do it, get it put on the Christmas list, but only if you've been a good boy! Second thoughts, best not to add anything to the Christmas list lol


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    I don think Nathan needs anyone else cuming down his chimney, I recon there's a right mess at his place already.


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  38. #38
    Quote Originally Posted by Plumb View Post
    I don think Nathan needs anyone else cuming down his chimney, I recon there's a right mess at his place already.


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  39. #39
    Senior Member Simmo's Avatar
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    Looks the business.
    Sticker? Marshy?



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  40. #40
    Finishing touches


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  41. #41
    misguided youth Little Mick's Avatar
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    Quote Originally Posted by Mr.Ed View Post
    Hope you're taking notes, I feel like ordering something...
    you have the address and the invite
    Life's too Short- YOLO!

  42. #42
    misguided youth Little Mick's Avatar
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    Great stuff Lee. Always love seeing things made and work! Well done bud
    Life's too Short- YOLO!

  43. #43
    So Lee, howabout getting a report on how the thumb brake worked out? It's on my to-do list for sure.

  44. #44
    Quote Originally Posted by zoidberg View Post
    So Lee, howabout getting a report on how the thumb brake worked out? It's on my to-do list for sure.
    Sorry for the late reply.

    So update: for first test out on the track, compared to being sat on the bike in the shed making bike sounds, it went well!

    What I do need to change is the lever as I found it fouling on my hand and was a little distracting, so took the knob off and was great for the rest of the day.

    Once I have changed the lever I may look at changing the leverage, as it could do with a little more travel, thus less force on my poor office hand 🏻


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  45. #45
    Admin Turbo's Avatar
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    Yeah, I can imagine you'd find a knob distracting

    So was your mind more free to think about and use the thumb lever as opposed to the foot?
    Or, is it just a question of access on the right side turns?
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  46. #46
    We all find knobs distracting!!


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  47. #47

    Thumb Brake, winter project

    The knob was hitting my left hand, very uncommon feeling

    Found it much better than using the foot brake, couldn't get used to that, but just need to work on placement so my knob don't foul again


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  48. #48
    Quote Originally Posted by Leezx10r View Post
    The knob was hitting my left hand, very uncommon feeling

    Found it much better than using the foot brake, couldn't get used to that, but just need to work on placement so my knob don't foul again


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    No one likes a foul knob Lee.

    Such an awesome project to do mate, seriously well done. Legend.

  49. #49
    Senior Member Linden's Avatar
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    Seriously the 2 current threads polishing and this one are getting disturbing

  50. #50
    misguided youth Little Mick's Avatar
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    Only because you are cross reading them linden. Polishing and knobs and all

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