An innovative way to reduce un-sprung weight, and centralize mass.
1992 ATK 604
(http://fjowners.com/gallery/10/1388_25_06_17_8_10_37.jpeg)
Neat concept. The rear only provides about 20% of possible braking. A small disc and 2 pot set up just might work on a heavy FJ. How much of the weight do you think would be saved from the rear un-sprung weight?
Just a consideration here, but if you break the drive chain,
you would lose the rear disk brake, as well as the engine braking.
Hope the front brake can handle the results.
I can attest that the front brakes will stop an FJ w/o any rear brake. Even 2 up, not a problem. I've been riding that way for about 25 years.
Ed
What? You have NO rear brake? Care to elaborate?
Bill
Quote from: FJmonkey on June 25, 2017, 09:36:58 PM
....The rear only provides about 20% of possible braking.
...yes, and the harder you brake with the front, the more that figure drops until near enough to zero.
Noel
Yep...
(http://farm5.static.flickr.com/4052/4415477809_6491bd29e8.jpg)
I don't conciously think about braking but always use both (except for slow full lock turns) but I lost my back brake on a fast ride down a mountain a while back. Obviously the bike could still be slowed but it felt wildly unsettled braking heavily with just the front. So much so I backed off.
Noel
Quote from: FJmonkey on June 25, 2017, 10:56:35 PM
Yep...
(http://farm5.static.flickr.com/4052/4415477809_6491bd29e8.jpg)
OK,
until zero. :biggrin:
Near enough I think Noel. I rarely use my rear brake in the twisties. My logic for this is predictability when leaned over. When leaned over to turn Left I have easy use of the rear brake. When leaned over to the Right my boot is getting stuffed between the lever and land. I fear that if the suspension is doing what it should and causes my boot to apply more brake than intended then bad stuff might happen. I am not a racer and have no intention of being the fastest in any group for any reason. I also could just be over thinking it, I tend to get wrapped around the axial for this.
Quote from: FJmonkey on June 25, 2017, 11:12:20 PM
I rarely use my rear brake in the twisties. My logic for this is predictability when leaned over. When leaned over to turn Left I have easy use of the rear brake. When leaned over to the Right my boot is getting stuffed between the lever and land. I fear that if the suspension is doing what it should and causes my boot to apply more brake than intended then bad stuff might happen. I am not a racer and have no intention of being the fastest in any group for any reason. I also could just be over thinking it, I tend to get wrapped around the axial for this.
Mark, tempted as I am to further comment on this subject of corners and braking, I have been down this road before (pun intended) and it didn't end well, I think I'll leave it here.
Noel
Quote from: ribbert on June 26, 2017, 06:54:19 AM
Mark, tempted as I am to further comment on this subject of corners and braking, I have been down this road before (pun intended) and it didn't end well, I think I'll leave it here.
Noel
We'll, that would be fantastic considering that this post was initiated simply to comment on a unique brake system (and on a dirt bike too), and was hijacked and morphed into personal braking techniques on road bikes.
:Facepalm:
Quote from: FJ1100mjk on June 26, 2017, 08:01:06 AM
Quote from: ribbert on June 26, 2017, 06:54:19 AM
Mark, tempted as I am to further comment on this subject of corners and braking, I have been down this road before (pun intended) and it didn't end well, I think I'll leave it here.
Noel
We'll, that would be fantastic considering that this post was initiated simply to comment on a unique brake system (and on a dirt bike too), and was hijacked and morphed into personal braking techniques on road bikes.
:Facepalm:
Yep, you're right, that's exactly how some of the best, most informative and interesting discussions here come about.
Noel
Quote from: simi_ed on June 25, 2017, 10:08:12 PM
I can attest that the front brakes will stop an FJ w/o any rear brake. Even 2 up, not a problem. I've been riding that way for about 25 years.
Ed
Sorry Bill, that is not quite accurate. I have a rear brake. I just don't use it.
Ed
Although this seems like an interesting idea for possibly reducing a little unsprung weight, and possibly to tidy up the rear wheel area if you have a show-bike, I honestly don't think it would work very well for anyone that lubes their chain regularly. There would be no way to prevent chain-lube from eventually getting on the brake disc or caliper/pads, rendering them useless................unless of course you had a dry, belt-driven bike.