Left hand rear brake (LHRB)

**pete-blen** · 22nd May 2015, 21:23

Originally Posted by Muzz67

That cable operated system looks a fairly simple way of doing it,, however , its actual power is doubtful surely?

could be more.... could be less.... all depends on the leverage ratio you use...

**Tazz** · 23rd May 2015, 13:46

Originally Posted by Muzz67

That cable operated system looks a fairly simple way of doing it,, however , its actual power is doubtful surely?

Yep, has been the point of discussion with someone much smarter than me here at work.
Going to make it as long as practically possible as I'm not even sure you could lock the rear with the foot pedal using your hand.
Still meandering a pulley/s in there as I know from winching 4x4's snatch blocks make a fooking amazing difference on load, so same principle and all, but the simpler the better.
The other problem is making sure there is enough travel to actually fully engage it.
I forget the measurements and I'm sure there is some adjustment in there, but the foot pedal on this bike has a fair bit of travel from lightly engaged to locked.

Not my forte but fun fun

**Tazz** · 23rd May 2015, 13:56

Originally Posted by Big Dog

If you go for something with a master cylinder bigger is not always better.
Bigger can just mean less control as they normally have bigger screws pushing more fluid and the rear is blinding easy to overcome.

+1 to mean skids.

Stupid phone / Tapatalk, apologies in advance.

Yeah part of it is also the amount of fluid it holds and it's relation to pad wear. Almost any motorbike one would be fine I'm sure but there was talk about MTB ones (like the new Rekluse option) not having enough fluid to avoid needing a top up as the pads wear.
If that holds any truth I don't know, but users of the MTB ones also report not having enough force to lock the rear either.

**Muzz67** · 23rd May 2015, 15:37

Prob I see with cable is that there may only be 12-15mm length of pull at the handlebar lever, and that may be needed to be doubled at the end of the footbrake exteder thingy,, halving the hand-levers power.
pulleys etc to increase power would also need more pull length at the hand lever end.

Not trying to be negative, just constuctive.
can def see the benefits of a hand brake.

**Tazz** · 23rd May 2015, 18:38

Yeah cheers for the feedback. It's a cheap success or failure either way. I remember seeing some trick but simple double pull lever contraption on a friends grass cart years ago, might be worth a phone call depending how it comes together.
I've also seen lever pulleys somewhere that pivot under load to pick up slack? They work as a pair.
Anyway, will just start basic as and work from there..

**nzspokes** · 23rd May 2015, 19:18

Originally Posted by Tazz

An agricultural version of this is the go with a wee decompression lever for it or vice versa with the clutch

Looked at a encased set of pulleys/rollers but this is nice and simple.

That is brilliant. Im going to make one. Easy. To test leverage I would pull down on the foot part of the lever and see how far along you need to be to lock the brake with little effort.

Bicycle brake levers come in different leverage ratios. So get one to suit.

**nzspokes** · 25th May 2015, 19:37

Im going to start on this tomorrow. Hard part as I see is mounting the cable outer for my bike. But may have just come up with an idea.

I have the plan for the lever on the that goes on the foot brake lever. And I have bicycle brake levers in 3 different ratios.

It will either work or it wont but worth a crack.

**Tazz** · 25th May 2015, 19:47

Originally Posted by nzspokes

Im going to start on this tomorrow. Hard part as I see is mounting the cable outer for my bike. But may have just come up with an idea.

I have the plan for the lever on the that goes on the foot brake lever. And I have bicycle brake levers in 3 different ratios.

It will either work or it wont but worth a crack.

Make 2 of everything?

Keep us updated

I'm going to start next week all going to plan. Might make the pivot out of plastic too as there is more scrap of that kicking about than metal.

Cool about the ratios, didn't know about that. Chur!

**Muzz67** · 25th May 2015, 20:11

**nzspokes** · 25th May 2015, 20:14

Yeah I think I would need a fair bit of leverage. That wont give it.

**Trials Rider** · 26th May 2015, 09:51

Hi Guys

CLAKE now offer the SLR (Staggered Lever Retrofit) which can be used with the foot pedal or by itself, it will fit straight over the Brembo master cylinders, this is the web link

http://www.motomox.co.nz/shop/show_s...ct.php?prod=83

Above is the SLR which uses your standard master cylinder, I have the CLAKE 2 which is an integrated system on my Beta 498 and love it

, http://www.motomox.co.nz/shop/show_s...ct.php?prod=84 you can adjust it to have both levers working independently or complete as one lever action, on the road I adjust it back so I have independant levers and off road I adjust it up for one lever action, if any of you are coming through kaiapoi you are welcome to try it out on my Beta (as long as you bring my bike back

)