Go Back   Two Wheel Fix > Riding > Street

Reply
 
Thread Tools Display Modes
Old 06-25-2009, 12:51 PM   #1
The Awesome
Custom User Title
 
Join Date: Sep 2008
Posts: 120
Default

Quote:
Originally Posted by TIGGER View Post
Mr Awesome , sir, we were taught to apply the rear brake first and then the front to avoid that problem anyway... I think. Try it and tell me if I'm right that the forward shift isn't as drastic. BTW I'm sure that you are right.
Was this taught in the context of racing or street riding? As I said before, I never use the rear brake, so I'm not a good person to ask about what context to apply it. In straight line braking in a performance riding context, the problem I see with that is you are creating a dead spot between closing the throttle and applying the front brake if you do it that way. Even the smallest window of time without using the front will ruin your chances at hitting a correct braking point. You would have to start braking sooner than desired if you wanted to apply the rear and then the front in sequence.

Another problem I have experienced when playing with the rear brake in straight line stopping is that when the rear becomes unweighted it seemed to be harder to control the bike and keep it stable without the rear wheel spinning free. I would assume this is a result of a spinning rear wheel creating a gyroscopic effect. I also noticed that in situations where I would apply a little more front than desired and actually lift the rear completely, it would tend to want to skid abruptly rather than slide smoothly when I set it back down. This would make it much harder to hit the turn in point that I wanted, because I would be fighting to settle the bike down deep into the corner. All of this is just personal observation and interpretation, so I could be completely off base with that. My experience with the rear brake is minimal, and the experiences I had could easily have been a result of riding technique or bike setup problems that I overlooked at the time.

Quote:
Originally Posted by shmike View Post
Awesome, good explaination and pic. That is some serious front-end dive though. I have always had mine set up to leave 10-15mm of travel at full stop.
I thought the same thing the first time I saw pictures of myself on the brakes. I asked my suspension guy about it and he told me that unused travel is wasted travel. Just make sure that for any given track you don't ever bottom out. If you do, changes need to be made to accommodate.

Quote:
Originally Posted by No Worries View Post
Not only am I a scientist, but I'm a realist too. Compare the stopping distance of cruisers with sportbikes in the magazines. The cruisers weight 200-300 pounds more, have smaller rotors, and touring tires, but stop in the same distance. If they put sticky tires on the cruisers, they would stop quicker. Could it be that the cruiser has two wheels on the ground while stopping?
I don't read bike magazines, but I have never ridden nor seen a cruiser that could stop anywhere near as quickly as a sportbike.

Quote:
Originally Posted by No Worries View Post
If I was on a modern sportbike braking so hard for a tight curve that my rear wheel was off the ground, I don't think I could successfully make the turn.
The faster you want to go, the more skill is required.

Quote:
Originally Posted by No Worries View Post
Sooner or later, someone from TWF will make it out to Denver and will want to ride Lookout Mountain. I want them to know how to ride it quickly and safely.
Unless Lookout Mountain has a bunch of Indiana Jones-esque booby traps, I'm sure it's no different than any other road. The same riding principles will always apply.
The Awesome is offline   Reply With Quote
Old 06-25-2009, 12:58 PM   #2
Amber Lamps
Moto GP Star
 
Join Date: Mar 2008
Posts: 14,556
Default

Quote:
Originally Posted by The Awesome View Post
Was this taught in the context of racing or street riding? As I said before, I never use the rear brake, so I'm not a good person to ask about what context to apply it. In straight line braking in a performance riding context, the problem I see with that is you are creating a dead spot between closing the throttle and applying the front brake if you do it that way. Even the smallest window of time without using the front will ruin your chances at hitting a correct braking point. You would have to start braking sooner than desired if you wanted to apply the rear and then the front in sequence.

Another problem I have experienced when playing with the rear brake in straight line stopping is that when the rear becomes unweighted it seemed to be harder to control the bike and keep it stable without the rear wheel spinning free. I would assume this is a result of a spinning rear wheel creating a gyroscopic effect. I also noticed that in situations where I would apply a little more front than desired and actually lift the rear completely, it would tend to want to skid abruptly rather than slide smoothly when I set it back down. This would make it much harder to hit the turn in point that I wanted, because I would be fighting to settle the bike down deep into the corner. All of this is just personal observation and interpretation, so I could be completely off base with that. My experience with the rear brake is minimal, and the experiences I had could easily have been a result of riding technique or bike setup problems that I overlooked at the time.



I thought the same thing the first time I saw pictures of myself on the brakes. I asked my suspension guy about it and he told me that unused travel is wasted travel. Just make sure that for any given track you don't ever bottom out. If you do, changes need to be made to accommodate.



I don't read bike magazines, but I have never ridden nor seen a cruiser that could stop anywhere near as quickly as a sportbike.



The faster you want to go, the more skill is required.



Unless Lookout Mountain has a bunch of Indiana Jones-esque booby traps, I'm sure it's no different than any other road. The same riding principles will always apply.
Street riding for sure! In fact this was the much touted MSF course I took in 1984... I had already "learned" to ride using cruisers and enduro bikes.

I'm sorry NW but when the racer guys, like Awesome and CEO, bust on you, I can't help but laugh my ass off!
Amber Lamps is offline   Reply With Quote
Old 06-25-2009, 01:01 PM   #3
shmike
Follower
 
shmike's Avatar
 
Join Date: Nov 2008
Posts: 5,549
Default

Quote:
Originally Posted by The Awesome View Post
I thought the same thing the first time I saw pictures of myself on the brakes. I asked my suspension guy about it and he told me that unused travel is wasted travel. Just make sure that for any given track you don't ever bottom out. If you do, changes need to be made to accommodate.
I guess the logic in leaving a few mm to spare is making sure you don't bottom out. If you can get to full travel on the brakes that leaves no room left to absorb any bumps on corner entry.

Total agreement on all other points. There must be a reason we ran the same number.

Last edited by shmike; 06-25-2009 at 01:10 PM..
shmike is offline   Reply With Quote
Old 06-25-2009, 01:07 PM   #4
shmike
Follower
 
shmike's Avatar
 
Join Date: Nov 2008
Posts: 5,549
Default

For those that don't understand the concept of loading the front forks with the brakes and keeping that load while cornering, I found a decent pic of tipping it in.

In a sequence this shot would be about 50-100 feet after Awesome's pic.

As the braking forces fade the lateral forces take over:
Attached Images
File Type: jpg 6 Homestead 5-26-08 7.jpg (248.8 KB, 1 views)
shmike is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 08:29 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2026, vBulletin Solutions Inc.