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rear brake operated by a brake lever on the left hand bar?

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colin1
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Joined: 17 Feb 2005
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PostPosted: 16:26 - 29 Mar 2006    Post subject: rear brake operated by a brake lever on the left hand bar? Reply with quote

a few months ago i had a go on a yzf450 and was told not to use the clutch when changing up or down. this seemed a bit odd at first but was fine. it means that the clutch lever is no longer needed.

however operating the footbrake while balancing on the pegs wearing big motocross boots was a bit tricky

so I have wondered, would it be possible to have the rear brake operated by a lever on the left hand bar, while you still have the front brake operated by the brake lever on the right hand bar ?

so the brakes are as easy to control as on a push bike

even better are there any bikes that already do this ?
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andy198712
Borekit Bruiser



Joined: 24 Oct 2005
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PostPosted: 17:27 - 29 Mar 2006    Post subject: Reply with quote

it prob had an auto clutch in it, makes it semi auto and doesnt stall,

i've seen these but i think its more a kinda thumb lever like quad accerators?
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Korn
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PostPosted: 17:31 - 29 Mar 2006    Post subject: Reply with quote

How about a left-hand master cylinder slaved onto the existing rear brake? Something like this...

https://www.solomotoparts.com/catalog/Thrust-Company-Rear-Hand-Brake-Stunt-Kit-for-Suzukis-p-22202.html
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Kickstart
The Oracle



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PostPosted: 17:39 - 29 Mar 2006    Post subject: Reply with quote

Hi

Presume you still need the clutch to pull away (not aware of any proper off road bikes with auto clutches). I would be tempted to go for the thumb operated rear brake system (lever goes under the l/h grip and you push it with your thumb).

All the best

Keith
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G
The Voice of Reason



Joined: 02 Feb 2002
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PostPosted: 17:47 - 29 Mar 2006    Post subject: Reply with quote

You can get centrifugal clutches for quite a lot of popular off road bikes. Means they can be tuned for maximum acceleration and shouldn't stall if the bike is dropped (which I can see being a big advantage with a heavy 4 stroke kicker).

I don't know how well it would work, but one thing I've seen discussed before is just nabbing a mountain bike braking system - instead of the cable pulling at the caliper, have it pulling on the rear brake lever it's self.
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stinkwheel
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PostPosted: 17:54 - 29 Mar 2006    Post subject: Reply with quote

As kickstart says, you get special thumb-operated brake levers for this exact purpose. Or you could bung the lever and master cylinder off a bike with a hydraulic clutch on.

G's idea has some merit too. No need for bulky hydraulic lines down the length of the bike and you would retain the normal rear brake lever too. You could use one of those funky 2-finger jobs.
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colin1
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PostPosted: 18:30 - 29 Mar 2006    Post subject: Reply with quote

some great replies there spoilt for choice and all with an interesting individual twist

im a bit surprised that there was something special about the yzf450 i rode as i had just assumed that this clutchless shifting was something that big dirt bikes did

and come to think of it we were told to do the same thing on the supermoto wr450's

hand controlled braking makes the idea of getting an offroader even more appealing. maybe i'll get one in a few years time.

of course kickstart is right that you will still need the clutch sometimes but not so much. didnt realise this until i thought about it and remembered. i hadnt thought of a thumb lever and i guess that wdnt get in the way

my inner cheap-skate like G's idea but it would need a bit of effort to install and develop to work well

thnx guys
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carlnicholson...
World Chat Champion



Joined: 13 Mar 2005
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PostPosted: 20:24 - 30 Mar 2006    Post subject: Reply with quote

There are loads of companies who deal with brake system conversions for disabled bikers.

Try and get a disabled biker mag, or search for the NADB on the web.

I'm sure you will have loads to choose from. Wink
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NSR Mick
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PostPosted: 20:31 - 30 Mar 2006    Post subject: Reply with quote

Mick doohan used one after he had smashed his leg up. I seem to remember one being in new products recently in either PB or MCN.
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Section59
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Joined: 05 Apr 2005
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PostPosted: 23:19 - 30 Mar 2006    Post subject: Reply with quote

COLINWALL wrote:
I had just assumed that this clutchless shifting was something that big dirt bikes did

and come to think of it we were told to do the same thing on the supermoto wr450's


Big dirt bikes only?

I clutchless shift on any bike i ride, on road, offroad it doesnt matter. - Its smoother, faster, and ensures you've always got atleast a bit of power going to the rear wheel, instead of completely cutting off all power, like you would if you used the clutch.

If you're not used to clutchless shifting, practice. Because it will make your riding a hell of a lot smoother between shifts.
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Sparks!
Sir Tart-a-lot



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PostPosted: 23:29 - 30 Mar 2006    Post subject: Re: rear brake operated by a brake lever on the left hand ba Reply with quote

COLINWALL wrote:
a few months ago i had a go on a yzf450 and was told not to use the clutch when changing up or down. this seemed a bit odd at first but was fine. it means that the clutch lever is no longer needed.

however operating the footbrake while balancing on the pegs wearing big motocross boots was a bit tricky

so I have wondered, would it be possible to have the rear brake operated by a lever on the left hand bar, while you still have the front brake operated by the brake lever on the right hand bar ?

so the brakes are as easy to control as on a push bike

even better are there any bikes that already do this ?


Hi, with off road bikes you can easily change up and down without clutch with no hassle.. they change really easily, there is no law against not usnig the clutch but off road, one less thing to worry about is very useful as you're usually too busy worrying about not falling off Mr. Green

Rekluse do bar brake kits for off road bikes, usually to compliment a n automatic clutch.

It is possible to keep both the rear brake + a bar brake.. you can DIY it by modifying a rear brake cylinder + extra line + a brake lever on bar. You can also buy kits.. most of us stunt lot use the FullThrottle kits from america but they are pretty expensive.

By the way, don't go for a bar THUMB brake as you won't get the pressure behind it, you really want a proper lever brake.

If you go down the bar+rear option, whatever you do.. don't press em' both at the same time Laughing
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colin1
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PostPosted: 01:22 - 31 Mar 2006    Post subject: Reply with quote

Looney wrote:


If you're not used to clutchless shifting, practice. Because it will make your riding a hell of a lot smoother between shifts.


i had thought that on road bikes you can clutchless up shift at high revs but shifting down without clutch was bad for the bike.

on the thumpers, it would change gear really easily without the clutch but i dont think its quite the same on normal road bikes

i might try it tho

to sparks

thanks for the tips it sounds like you have used this kind of thing
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Section59
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PostPosted: 05:34 - 31 Mar 2006    Post subject: Reply with quote

Its the same for all bikes. Aslong as you change down at the correct RPM, it'll slot into position just as easy as it would going up the box.

TBH though, i only use clutchless downshift when im going slow and cant be arsed to reach for the clutch.

Im not good enough to do it when on the brakes flying into a corner, and i cant afford the repair bill for when i get the revs wrong and hear the nasty sound of the gearbox eating itself. Mr. Green
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GearboxGeezer
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PostPosted: 19:11 - 30 Apr 2006    Post subject: Reply with quote

Why not get a thumb clutch?

U only need it for pulling away and stopping, itll requier alot less effort than a brake. Then you can use a proper bar, Would make wheelies miles more safer/easyer
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