Actually that sounds like a pretty cool idea until you consider the effect of chain lube on a brake rotor, this is why the brake rotor is usually on the oposite side of the wheel as the sprocket.

 

Chain lubricant?

 

Ah dammit, I got beat to the punch. lol.

 

As the OP noted, it sounds like something Buell would try.

Buell used belt drives on most (all?) of their bikes, didn't they?

I could swear the 1125R had to convert to a chain for AMA racing, and I KNOW the Blast was belt driven.

 

Good call, I don't know how I missed that. Still seems like and obstacle that could be overcome for what would be a pretty dramatic benefit. I was just thinking that maybe the materials might be different as well. High end rotors are made of all sorts of exotic **** so maybe that wouldn't work well as a sprocket material.

 

most OEM rear sprockets are made of stamped steel.

 

^
His concept would have a caliper still, it would just go over the chain.

I can envision exactly how this works in theory, but in actual practice, it has some flaws that make it unpractical, like the chain lube and the differences in materials between a rotor and sprocket.

Plus sprockets don't last near as long as rotors.

 

It's been done.
Try again.

 

Chopper guys do that sometimes. I tend to agree with the idea and have thought of it EXCEPT, if I was a manufacturer putting a product out that I KNOW some will not maintain. I'd be deathly afraid of having to defend myself when a snapped chain clogged up a rotor/ caliper and locked the wheel..... or broke the caliper rendering the rear brake unusable.... or.....

And then a guy like Fro**** shows up as the prosecution's expert witness. (Sorry, you had to be there...) ;D

 

Did you mean somthing like this..

http://image.hotbikeweb.com/f/90532...9053226+w750+st0/0613_hbkp_09z+big_bear_choppers+brake_sprocket_combination.jpg

jonh.

 

I guess i've never looked closely enough at a bike with a single-sided swing-arm to see how they do it now...

 

what's wrong with a drum brake instead of disk like?

 

what's wrong with a drum brake instead of disk like?

Weight and heat. A drum brake on a 100MPH plus bike is a false sense of security. There was a guy from this board (Gstrom maybe?) who had a drum brake 500 and at his first track day (VIR South) was still using the rear brake. TOTALLY fried that thing. MAJOR stink, smoke, and all! It was ugly.

 

i see your point.

 

^
His concept would have a caliper still, it would just go over the chain.

why would it need to go over the chain? put it on the 9:00 part of the sprocket. chain goes above and below it.

 

I guess i've never looked closely enough at a bike with a single-sided swing-arm to see how they do it now...

just like a car. the brake is behind the wheel.

 

^
His concept would have a caliper still, it would just go over the chain.

why would it need to go over the chain? put it on the 9:00 part of the sprocket. chain goes above and below it.

WE know that... but the chain doesn't. ;D

Chains can do some strange and surprising things when they fail. And it's not always a break. Sometimes derailed from being loose and etc, etc. Then there's the brake line to the caliper, the cold outside ring necessary for the sprocket, restraining expansion of a hot rotor and resulting in warping, etc, etc. It's not really as practical as it appears at first glance. Of course, that's JMO.

 

Knightslugger mentioned drum brakes, what about inboard brakes?

http://hellforleathermagazine.com/images/Beringer_inboard_2.jpg

jonh.

 

Knightslugger mentioned drum brakes, what about inboard brakes?

http://hellforleathermagazine.com/images/Beringer_inboard_2.jpg

jonh.

Well, once you actually had something that would slow something down, there are two big issues that you'd like to address when it comes to wheels and brakes. Those would be the rotating mass for flywheel effect and the weight of all related parts, rotating or not, for unsprung weight. Looking at that picture I don't see anything it does for either of those issues.

 

Knightslugger mentioned drum brakes, what about inboard brakes?

http://hellforleathermagazine.com/images/Beringer_inboard_2.jpg

jonh.

Well, once you actually had something that would slow something down, there are two big issues that you'd like to address when it comes to wheels and brakes. Those would be the rotating mass for flywheel effect and the weight of all related parts, rotating or not, for unsprung weight. Looking at that picture I don't see anything it does for either of those issues.

I've never come across them on a bike they seem to be something new? check out Beringer's site, here is the link.

http://hellforleathermagazine.com/2008/12/beringer-inboard-brakes-plane.html

jonh.

 

...and then there's this thing

I don't really get what this is trying to do

http://www.brakko.org/

 

I don't really get what this is trying to do

http://www.brakko.org/

Looks like instead of applying the reverse angular momentum to the axle of the wheel (which is what traditional brakes do), it's attempting to transfer it to the outer edge of the inside rim. I don't see too much of a benefit other than reducing brake pad life and requiring less force to stop the wheel.

 

I guess i've never looked closely enough at a bike with a single-sided swing-arm to see how they do it now...

Like this:

If you look closely at the rear wheel, the brake is inboard of the sprocket which is outboard of the swingarm itself.

^
His concept would have a caliper still, it would just go over the chain.

why would it need to go over the chain? put it on the 9:00 part of the sprocket. chain goes above and below it.

WE know that... but the chain doesn't. ;D

Chains can do some strange and surprising things when they fail. And it's not always a break. Sometimes derailed from being loose and etc, etc. Then there's the brake line to the caliper, the cold outside ring necessary for the sprocket, restraining expansion of a hot rotor and resulting in warping, etc, etc. It's not really as practical as it appears at first glance. Of course, that's JMO.

They don't necessarily need to fail to cause damage either. When a chain gets loose and is not adjusted it can "snake" on it's slack side when on the throttle and do the same on the opposite side when off throttle. This "snaking" action can actually saw through a swing arm surface or in the case of a brake caliper located at the "9 o'clock" position; the caliper could be damaged or destroyed.....sean

 

Re: ...and then there's this thing

I don't really get what this is trying to do

http://www.brakko.org/

After a cursory review, plumbing through axles with seals and special breaks to disconnect the hydraulic lines for a wheel change, I think the answer lies in this link. Enjoy. ;D

http://en.wikipedia.org/wiki/Rube_Goldberg_machine

 

Knightslugger mentioned drum brakes, what about inboard brakes?

http://hellforleathermagazine.com/images/Beringer_inboard_2.jpg

jonh.

thats been done a lot too, its called an anchor. ;D