How fast can you stop. Have you tried?

[Mully]

The riders who make rediculous claims are the ones who don't bother even seeing if what they claim is possible with today's technology.

Well, I'll have you know that my RF stops with enough force to change the rotation of the Earth, and make rips in the Space Time Continuum.

[Badjelly]

I would agree with Badjelly. I am probably the one person on KB who uses maths more than anyone. But then I go and put it into practice. Theory (and math) is great to work out what is possible. Putting it into practice is where it really counts.

Yes. Your emergency-braking-on-a-bend experiments are particularly commendable!

[rocketman1]

I will go with a buddy to lonely piece of road with a tape and mark white line across with a bit of pumice or something then at varying speeds mark where I finish up and see if I can better the distance. Why not

I see worn tyres coming up, but it hopefully will prove something, and give some appreciation of following distances.
I will let you know the distances.

[BMWST?]

I will go with a buddy to lonely piece of road with a tape and mark white line across with a bit of pumice or something then at varying speeds mark where I finish up and see if I can better the distance. Why not

I see worn tyres coming up, but it hopefully will prove something, and give some appreciation of following distances.
I will let you know the distances.

you dont have to make 50 tyre shredding stops....all you have to do is make a few stops gradually increasing the force that you use on the (mostly) front brake...dont put it on hard at first increase the pressure as ou slow down.I am betting that you will decrease your stopping distance by lots....its really good practise!

[racefactory]

[QUOTE=rocketman1;1904154]I will go with a buddy to lonely piece of road with a tape and mark white line across with a bit of pumice or something then at varying speeds mark where I finish up and see if I can better the distance. Why not

I see worn tyres coming up, but it hopefully will prove something, and give some appreciation of following distances.
I will let you know the distances.[/QUOTE

I'll give you some bench marks.

I was reading an article by some government safety people in some country that made some findings upon motorcycle emergency braking and braking performance.

They took a Honda GL1500 and a Honda CBR929 and made hundreds of braking attempts.

Basicallly, they did stops from 100kph. Amazingly the CBR929 and the GL were very similar and there was no real difference between the 2 in stopping distance.

They got 38m as an average for the good runs.

I then looked up some braking stats from 100kph and i found that cars like Honda Integra type R do 38m from 100. There was a porsche 911 GT3 cup car that could do 32m!! Cars with really big sporty tyres like the 911 turbo and GT2 did 35m. I'm not sure if bikes could touch those distances. Family cars with tyres under 200 in size did 40- 42m generally.

Try see what you can get against 38m and report back?

[fatzx10r]

i had a head on with a car once, at a low speed of corse.... and i stoped real quick. wouldnt want to repeat it again

[Jantar]

.....They got 38m as an average for the good runs.

I then looked up some braking stats from 100kph and i found that cars like Honda Integra type R do 38m from 100. There was a porsche 911 GT3 cup car that could do 32m!! Cars with really big sporty tyres like the 911 turbo and GT2 did 35m. I'm not sure if bikes could touch those distances. Family cars with tyres under 200 in size did 40- 42m generally.

This equates with the best data I have seen. Proffessional riders on a perfect surface and 38 m is 1.03 G.

Most riders on a typical road surface 0.9 G would be a satisfactory target to aim for. That's 44 m as a good stopping target.

[hmmmnz]

stopping??? not very fast, drums front and rear arnt really there to stop you, just to pass the wof, i'd stop faster if i put my feet down

[Ixion]

Y' reckon? Fastest stopping I ever heard of was the Vincent. 20 foot from 30 mph. Double side front admittedly.

In fact drum brakes from lowish speeds stop faster (tyres being equal) than disks. Greater friction area, and there's not time enough for the heat bukild up to stuff them

[racefactory]

Y' reckon? Fastest stopping I ever heard of was the Vincent. 20 foot from 30 mph. Double side front admittedly.

In fact drum brakes from lowish speeds stop faster (tyres being equal) than disks. Greater friction area, and there's not time enough for the heat bukild up to stuff them

But it's not about brakes, it's about tyres and weight isn't it? Any properly maintained brakes can provide enough to skid the front wheel, so isn't it about how much of that force the tyre can take?

[Jantar]

...Any brake can provide enough force to lock the front wheel, so isn't it about how much of that force the tyre can take?

Oh boy! Have you got a lot to learn. If any brake can lock up the front wheel, then why do manufacturers go to the expense of multi caliper, floating disks, etc? An old single leading edge drum would do just fine.

[racefactory]

Oh boy! Have you got a lot to learn. If any brake can lock up the front wheel, then why do manufacturers go to the expense of multi caliper, floating disks, etc? An old single leading edge drum would do just fine.

To improve feel and control... doesnt determine outright stopping distance.

[doc]

Oh boy! Have you got a lot to learn. If any brake can lock up the front wheel, then why do manufacturers go to the expense of multi caliper, floating disks, etc? An old single leading edge drum would do just fine.

You forgot about USD forks. Thats what gives SM his advantage.

[discotex]

To improve feel and control... doesnt determine outright stopping distance.

I think you'll find "feel and control" makes a huge difference.

If you can't feel the front about to wash out you're going to crash or brake less hard.

[Dean]

im being taught emergency braking by a mate he makes me speed as fast as i could (which aint that fast considering ive got a gn250 lol).and then visualize a little girl or boy ran infront of the road im getting there i gotta practise practise.my mate once raced in the isle of man and he made me do another excercise where i have to get my tyre nearly touching his like an mm away from his out in waipu.hes crazy whenever i dont do it right or i bump into him we have to do it again. im only on ma dam learners !!!!