Rear end slides (sideways) under hard breaking

Replaced my rear pads at 18,000 km.

Some of this has been said above. Don't worry about trail braking yet.

If it's sideways and you're hard on the rear brake, it's best to not let go.
If you have room, you can release the front brake, and then reapply it. If you lock the front, you want to release it asap, and reapply, if you're not already on your butt.

Try adjusting the pedal, and use your leg rather than your toe with the rear brake, so that you don't overdo it.

70-30 doesn't sound right to me. If the bike is balanced on both tires to start, it's might be 50-50. Once the weight shifts forward, it will get more than 70. If the rear tire is off the ground, it's 100% front.


You are going to shift forward with the bike if you're not up tight to the tank and gripping it with your thighs.
Having your weight down is good, but try to brace with your thighs, and don't add steering inputs by locking your arms.
Don't try to steer and brake at the same time.

Brakes aren't on off switches.
You need to ease them on until the weight is shifted.
It's "I want to STOP!', not "STOP!".
As you get better and smoother, you can get on them a little faster as you notice the weight shift, but remember that the rear will lose traction as the weight shifts forward.

You don't have to practice at high speed. Something like 25-40kph will do.
Once your really super smooth, and have some experience under your belt, you can look into things like trail braking.
But for now work on smooth and consistent.
 
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mmmnaked said:
I'm surprised at how many 'veteran' sport bike riders will advise not using the rear brakes, and then preach about learning how to properly use the fronts. Gentlemen, if you put the same amount of time and effort into also learning to use the rear brakes you'll be a more complete rider.
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This! "Only 30% of braking effort from the rear wheel", some say, so why bother.

Sure...but using both together gives you 30% more braking! Use both together..practice until it's second nature, then in a panic situation it won't be something you'll have to think of, so instead of crashing while only using 70% of your bikes stopping ability (front brakes only) you may avoid the crash by using all 100% of it.

RockerGuy said:
Yall know there's cruiser riders on this forum, right?
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I use my front brakes for the bulk of my stopping power, but I do also use the rear at the same time, even if only enough to have my foot resting on the pedal. And trust me, having practiced emergency stops on my bike, not using the rear brake dramatically lengthens my stopping distance - I can haul down fast using threshold braking on both wheels, but if I mash the front only the bike just squats, feels unstable, and of course takes a lot farther to get stopped.
 
Actually from a stopping distance argument, a sport bike will likely perform the same stop with just the fronts. It's not about maximum braking, it's about rear wheel control. Under hard emergency braking there's so little weight on the rear wheel that the brake may as well not be there. But I wasn't talking about outright stopping power anyway - there are more uses for the rear brake and anyone calling themselves a good rider will know how to use em.
 
mimico_polak said:
Is there new requirements coming? I still look forward to graduated licensing with restrictions on power for new riders.
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Dreams ... it makes too much sense, so it will never happen .... like lane splitting. In the meantime, we will see these posts when people ask very fundamental questions AFTER they start riding on the street.
 
OP asks about a problem with hard braking on his sport bike.

Forum posters reply you need to do x, y, and z when you're not emergency braking or if you're on a cruiser or riding dirt.

GTAM.
 
PrivatePilot said:
This! "Only 30% of braking effort from the rear wheel", some say, so why bother.

Sure...but using both together gives you 30% more braking! Use both together..practice until it's second nature, then in a panic situation it won't be something you'll have to think of, so instead of crashing while only using 70% of your bikes stopping ability (front brakes only) you may avoid the crash by using all 100% of it.
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Well, I disagree with you completely.
If a sport bike is at maximum stopping ability, the rear gets extremely light and will start to lift. If it gives me more than 3% (not the 30% you mentioned) braking ability I would be extremely surprised.
 
No wonder insurance rates are thru the roof. Nobody can agree how to stop these bloody things.
 
RockerGuy said:
All the track hos use front only. They know it all
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Man, you make it a habit to be wrong don't you?

Most "track Hos" replying are advicing to use rear brake i.e.
dricked said:
Pretty surprised to see how many people can't/don't use the rear brake. I had to replace the rotor/pads after 30,000km.
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LWTRacer said:
I can brake hard enough to bring the rear up on the R3...same size tire as the Ninjette.

Stop mashing the brakes.

Christ all mighty the front tire on my RD400F was like a damn bicycle tires and I had that hopping around coming into Allens at Shannonville.

ABS is a nice thing to have, but its not a do all. Remember that
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LOL @Ninjette
 
ZX600 said:
Man, you make it a habit to be wrong don't you?

Most "track Hos" replying are advicing to use rear brake i.e.
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I only use my rear brake to tighten up a line at the track if I've buggered something up. Seems like that advice wouldn't really apply (or make sense to) someone who is wondering why their rear brake locks up and slides under heavy braking.

There are two giant, 12"+ rotors up front, clamped with four or six piston calipers, radially mounted to reduce flex and twisting.
There's one tiny 4-5" rotor in the rear, with a single piston caliper. Seems pretty straightforward which does most of the work.

OP needs to learn to use his brakes effectively, and correctly, and stop following so closely.
 
Not sure why you quoted me since I don't think i provided any advice on "how" to use the rear brake or did I?

Anyways, seems like the OP needs to practice the use of the rear brake, nothing much people can say, this is one of the cases when the OP has to experience it by practicing on an empty lot etc.

99CBRF4 said:
I only use my rear brake to tighten up a line at the track if I've buggered something up. Seems like that advice wouldn't really apply (or make sense to) someone who is wondering why their rear brake locks up and slides under heavy braking.

There are two giant, 12"+ rotors up front, clamped with four or six piston calipers, radially mounted to reduce flex and twisting.
There's one tiny 4-5" rotor in the rear, with a single piston caliper. Seems pretty straightforward which does most of the work.

OP needs to learn to use his brakes effectively, and correctly, and stop following so closely.
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Re: Rear end slides (sideways) under hard braking

shanekingsley said:
I think I overuse my rear brake. My right boot has literally worn away where my foot presses the rear brake and my boots are the Daytona Evo Sports GTX, so now I need a new outer boot. My rear brake is METAL AND SPIKED, so this may also have something to do with it, but this is also from everyday commuting in traffic though with lots of slow speed stuff. I go through rear brake pads about as often as front pads.
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Jesus H, a spiked brake pedal? Is that some sort of ADV thing? Sounds painful.

+1 on the rear pads though. Commuting does a number on them.
 
ZX600 said:
Not sure why you quoted me since I don't think i provided any advice on "how" to use the rear brake or did I?

Anyways, seems like the OP needs to practice the use of the rear brake, nothing much people can say, this is one of the cases when the OP has to experience it by practicing on an empty lot etc.
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Haha ... yup, the guy who hasn't been back since page 1 :D
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