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Thread: Race chassis

  1. #346
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    20th January 2010 - 14:41
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    Thumb brake

    I should be posting this but what the hell.......
    This is a bloody simple and clever set up. what with the cable ties as well its so bucket....
    Sometimes when you look at stuff its like...... its so obvious why didn't i think of it.......

    You in Dave....

    Realistically if you use a Mountain bike lever as well as the Caliper you could delete the Slave.
    For mine i am planing on using a KTM50sx..

    I also have a pic of the ISR set up i will post later.
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    Kinky is using a feather. Perverted is using the whole chicken

  2. #347
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    13th June 2010 - 17:47
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    That is rough enough to be a bucket...Please, if anyone does this, put the M/C on the frame rather than the forks and remember that all levers must be ball - end....

    What do you need a thumb brake for Hus, gout playing up ?

  3. #348
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    Quote Originally Posted by Grumph View Post
    That is rough enough to be a bucket...Please, if anyone does this, put the M/C on the frame rather than the forks and remember that all levers must be ball - end....

    What do you need a thumb brake for Hus, gout playing up ?
    Nah.... from the Assen accident when i was leading the Championship. in 92.....
    Limited leg movement......



    Kinky is using a feather. Perverted is using the whole chicken

  4. #349
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    25th March 2004 - 17:22
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    Ha! I was looking at a thumb rear brake in the weekend. He'd modified the foot master cylinder by putting a sleeve in the reservoir (integrated) else the window gets blown out. (Retains foot brake, you feel pulsing through both). He had a Recluse auto clutch on his KTM, & going down snotty hills with legs flailing you need some rear brake. I've been fantasising about a rear brake for my GasGas just as I like to ride the brake a bit exiting greasy left handers as a variable traction control & it would be nice to do it on right handers & probably be more controllable that through MX boots.

    But this setup has an AP MC which wouldn't be cheap & its reverse action to most with a pull??
    Don't you look at my accountant.
    He's the only one I've got.

  5. #350
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    24th July 2006 - 11:53
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    Quote Originally Posted by F5 Dave View Post
    I've been fantasising about a rear brake for my GasGas just as I like to ride the brake a bit exiting greasy left handers as a variable traction control & it would be nice to do it on right handers & probably be more controllable that through MX boots.
    I've got to like using the 525's decomp for that, a lot of the time it's just the right compromise between normal engine braking and a dab on the pedal.

    Quote Originally Posted by F5 Dave View Post
    But this setup has an AP MC which wouldn't be cheap & its reverse action to most with a pull??
    Aw, come on Dave you can figure out how to pull on a push MS, shirley.
    Go soothingly on the grease mud, as there lurks the skid demon

  6. #351
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    Quote Originally Posted by F5 Dave View Post
    Ha! I was looking at a thumb rear brake in the weekend. He'd modified the foot master cylinder by putting a sleeve in the reservoir (integrated) else the window gets blown out. (Retains foot brake, you feel pulsing through both). He had a Recluse auto clutch on his KTM, & going down snotty hills with legs flailing you need some rear brake. I've been fantasising about a rear brake for my GasGas just as I like to ride the brake a bit exiting greasy left handers as a variable traction control & it would be nice to do it on right handers & probably be more controllable that through MX boots.

    But this setup has an AP MC which wouldn't be cheap & its reverse action to most with a pull??
    Quote Originally Posted by Ocean1 View Post
    I've got to like using the 525's decomp for that, a lot of the time it's just the right compromise between normal engine braking and a dab on the pedal.

    Aw, come on Dave you can figure out how to pull on a push MS, shirley.
    Maybe its me. But i have always found the Brembo's rear brake on the Berg and KTM to be very fierce.

    Have a look at kart cylinders Dave probably cheaper as well.


    But the MC set up on a MTB would be far easier

    i always was going to use a Thumb throttle but i hadn't seen the real set up until i seen Doohans. as they always seemed to avoid pic of it. Shit i thought it was a Button.



    Kinky is using a feather. Perverted is using the whole chicken

  7. #352
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    Quote Originally Posted by husaberg View Post
    Maybe its me but i have always found on the Berg and KTM the rear brake is fierce.
    Me too. But after months and months of dedicated practice I thought I'd finally got the technique down so well I could actually achieve some useful rear brake without immediately locking it up altogether. Then I noticed the pads were down to steel.

    Quote Originally Posted by husaberg View Post
    But the MC set up on a MTB would be far easier
    Is that a hydraulic item berg? Is bloody cute, would you rig it as a second caliper?
    Go soothingly on the grease mud, as there lurks the skid demon

  8. #353
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    Quote Originally Posted by Ocean1 View Post
    Me too. But after months and months of dedicated practice I thought I'd finally got the technique down so well I could actually achieve some useful rear brake without immediately locking it up altogether. Then I noticed the pads were down to steel.



    Is that a hydraulic item berg? Is bloody cute, would you rig it as a second caliper?
    Yes hard to believe but yes.
    (Someone already has the complete system) the name escapes me (Sketchyracer?)but he was the one who initiated the 12v caravan water pump on a bucket as well. I had an idea of using the MTB brakes about 2 years ago, but he actually Does stuff

    I plan on using a formula Caliper of a KTM 50 just as cute
    They have plastic pistons, no bleed nipples (bleed with a Syringe)

    For reference to the size the bolt heads are 8mm.

    (they Make MTB stuff as well.
    I plan on only using one circuit.



    Kinky is using a feather. Perverted is using the whole chicken

  9. #354
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    31st July 2005 - 11:15
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    Quote Originally Posted by husaberg View Post
    I plan on using a formula Caliper of a KTM 50 just as cute
    They have plastic pistons, no bleed nipples (bleed with a Syringe)

    For reference to the size the bolt heads are 8mm.
    Nice.

    I've just found a CRF caliper; they are very light and small; as well.... sh!t another honda part on my yamaha....

  10. #355
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    Quote Originally Posted by Bert View Post
    Nice.

    I've just found a CRF caliper; they are very light and small; as well.... sh!t another honda part on my yamaha....
    If i wasn't so lazy i would take a photo of it with something to represent the scale rather than sealing a pic of the net.

    I am not sure you can have to many Honda bits



    Kinky is using a feather. Perverted is using the whole chicken

  11. #356
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    25th March 2004 - 17:22
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    Yeah Glen (Sketchy) was first to use a mtb brake as far as I'm aware. I bought a cable operated one & machined a disc & mounting for our pram. Just have to finish off the mount for the calliper, but that's where I've run into an issue. Too much plastic so the mount would be too long & vulnerable to bending when loaded into the Hatchy. Pity as its a brilliant idea, - 2 kids down steep hills in these parts to be able to drag the brakes would be gold.

    Back to the Buckets, or rather tangenting off to my dirtbike; I want to be able to retain the std fittings as it will be piggybacked onto the original banjo fittings.

    So really, why would they make a 'reverse' cable pulled m/c?
    Don't you look at my accountant.
    He's the only one I've got.

  12. #357
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    Yeah the MTB brakes work great as a rear brake, however will only last a lap before they over heat if you try and do skids into the turns...

    My effort was really half arsed and it will be getting rebuilt soon to make it looks nicer and be lighter! I gotta shave a supercharger worth of weight off the bike haha


  13. #358
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    Not to mention the cammy engine in the first instance.
    Don't you look at my accountant.
    He's the only one I've got.

  14. #359
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    Quote Originally Posted by F5 Dave View Post
    Not to mention the cammy engine in the first instance.
    It's lighter than the MB.....


  15. #360
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    Must be all that Chinese goodness oozing out
    Don't you look at my accountant.
    He's the only one I've got.

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