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Jack_Cheese
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PostPosted: 19:30 - 18 Oct 2006    Post subject: Sliding the rear... Reply with quote

Correct me if i'm wrong, but isn't this the proper/fastest way to corner? The number of bikes i see with blue, shredded rear tyres and absolutely huge front chicken strips seems to confirm this.

Whenever i feel it happen, it makes me really really nervous. I can't keep it sliding, and immediately pull the rear back into line. Any advice on how to keep the rear sliding through the corner properly? I seem to be a little bit nervous after binning it a few months back.

Jack
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mr.z
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PostPosted: 19:35 - 18 Oct 2006    Post subject: Reply with quote

"backing it in"? probably for the track, imo most track tecniques aren't practical for real world rideing (unless you have a supermoto) and much more likely instead to come a cropper on gravvel, cowshit/oil/diesel/vomit on the roads.

Being smooth and observeing stuff waaay ahead is the better way to "make good progress" propperly trained bike copper will usually be faster than somebody doing a rossi impression, and they'll probably end the journey on their bike not in an ambulance.
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Jack_Cheese
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PostPosted: 19:47 - 18 Oct 2006    Post subject: Reply with quote

It's not so much backing it in, as the rear wheel is totally in line approaching, and entering the corner, and i was under the impression that backing it in was effectively powersliding into the corner.

What i was referring to is just when the rear starts to slide, mid - corner. Not a big twitch, but a slight, progressive slide. It feels half natural, half totally shit-my-pants scary.

Jack
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G
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PostPosted: 19:55 - 18 Oct 2006    Post subject: Re: Sliding the rear... Reply with quote

Jack_Cheese wrote:
Correct me if i'm wrong, but isn't this the proper/fastest way to corner? The number of bikes i see with blue, shredded rear tyres and absolutely huge front chicken strips seems to confirm this.

Whenever i feel it happen, it makes me really really nervous. I can't keep it sliding, and immediately pull the rear back into line. Any advice on how to keep the rear sliding through the corner properly? I seem to be a little bit nervous after binning it a few months back.

Jack


No, it is most definitely not.

Even in top class road racing (moto gp etc) only a handfull manage to do it usefully.
You can get used to doing it on the road, but I most definitely wouldn't reccomend doing it while 'pushing it'.

Are you sure you haven't seen people that have done trackdays, or more likely, bought race rubber off others for the more disposable rear tyre?

From my racing, even when I've been pretty much on the limit of traction and keeping up mid corner with the top people, I've still often got chicken strips left on the front, on the left at least. Why? Because I hang off.


Anyway, sliding the bike - going into a corner, on a bike with reasonable engine braking:
Knock it down a gear just as you are turning in. This should get it sliding a bit, now use the rear brake to keep it sliding, otherwise the wheel speed will catch up with the road speed.
When doing this, always, always keep covering the clutch incase it all starts to go wrong.
(pic of me playing with the above technique a month ago)

Coming out of a corner...
Definitely do not attempt this - likely to end in pain in a lot of cases!
Get on the power more, in a very, very controlled fashion!
You need to be /just/ past the limit of traction.


This sort of thing is much easier to play with off road on an off road bike.
On the really muddy field I was at last friday it was just a case of leaning the bike over in first and opening it up for a nice controlled tight 180 degree powerslide..


Last edited by G on 20:00 - 18 Oct 2006; edited 1 time in total
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TL666
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PostPosted: 19:59 - 18 Oct 2006    Post subject: Reply with quote

I've look in the tyre bins at the TT pits. All the front tyres have big strips of unused rubber. Its down to higher profiles I think.
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G
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PostPosted: 20:01 - 18 Oct 2006    Post subject: Reply with quote

Sorry, started writing post before there were any replies.

What you are feeling is the limit of traction.
When you start to get little slides, it's basically the tyres are just on the limit.
At this point you need to either find a way to get more traction, or back of a bit next time.

It may be something in your technique could be adjusted to give you more room before you run out of traction, or your suspension setup, tyres etc.
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Wooly R6
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PostPosted: 21:28 - 18 Oct 2006    Post subject: Reply with quote

just ride with what feels safe - sod everyone elses tyres!!!!
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Jack_Cheese
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PostPosted: 21:35 - 18 Oct 2006    Post subject: Reply with quote

Humm, i'll check the rear tyre pressure then. I suppose it may be due to low pressure, but it doesn't feel as soggy as when the pressure is low, it still feels full of feedback, like i know exactly where the rear is planted.

I've noticed that it mainly happens on a roundabout just round the corner from work meaning the tyres are still cold. That probably doesn't help...

As for technique, i don't lean off as much as i should. I aggrovated my knee injury on sunday when i went up to rivvy, not a nice feeling at all and the first time i've aggrovated it, so i've been avoiding leaning off quite a bit.

And as for suspension, i've heard the sachs rear shock on my bike is hardly the creme de la creme of suspension technology.

Ah well, i should hopefully be getting fully adjustable forks in the next few months, at least that should allow me a little fiddle. My forks have a heavier fork oil in than standard, as the dive under braking was pretty bad. Riding my bike was like consuming a large quantity of alcohol and marijuana, then playing rodeo on a rocking horse.

Jack
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Ferret
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PostPosted: 21:37 - 18 Oct 2006    Post subject: Reply with quote

Jack_Cheese wrote:
What i was referring to is just when the rear starts to slide, mid - corner. Not a big twitch, but a slight, progressive slide. It feels half natural, half totally shit-my-pants scary.

Jack


You have shit tyres or not enough heat in em Rolling Eyes Are they Dunlops Twisted Evil

Ta
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Jack_Cheese
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PostPosted: 21:42 - 18 Oct 2006    Post subject: Reply with quote

Michelin pilot powers (single compound version), and no i don't think i'm getting enough heat in 'em. (see previous post)
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G
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PostPosted: 21:44 - 18 Oct 2006    Post subject: Reply with quote

Cold tyres and a roundabout with a poor surface could easily be the cause in this case.

I was more reffering to make/model of tyre, than pressure. Usually got to have pressures quite a way out to make a difference.
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Jack_Cheese
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PostPosted: 21:46 - 18 Oct 2006    Post subject: Reply with quote

G wrote:
Usually got to have pressures quite a way out to make a difference.


Or just bung my GF on the back... Whistle Embarassed Whistle
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GearboxGeezer
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PostPosted: 21:48 - 18 Oct 2006    Post subject: Reply with quote

Ive wheel spun it out of pretty fast courners ( thats on a rs 125 as well! Mainly due to cold tyres ) but never backed it in. And I dont really want to, When I acidently do it it sort of catchs and does a lil highside which ant a nice feeling on the road.
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G
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PostPosted: 21:48 - 18 Oct 2006    Post subject: Reply with quote

Erm, what bike, not still a planet?
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Jack_Cheese
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PostPosted: 21:50 - 18 Oct 2006    Post subject: Reply with quote

Yeah. I couldn't actually increase the rear preload either, because the preload adjuster is surrounded by airbox. The ride was... erm... interesting...
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Method
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PostPosted: 22:05 - 18 Oct 2006    Post subject: Reply with quote

You wanna back it in properly?

Check my avatar.
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Jack_Cheese
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PostPosted: 22:09 - 18 Oct 2006    Post subject: Reply with quote

Method wrote:
You wanna back it in properly?

Check my avatar.


I must admit, speedway does look like a total rush, if a little beyond my skill level... lol
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steveh
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PostPosted: 22:12 - 18 Oct 2006    Post subject: Reply with quote

i did it on friday the 13th, was great, came right out HUGEE skid mark all the way round the corner, near full lock on the bars, great rush.........



until....



https://img92.imageshack.us/img92/6541/photo0008cn9.th.jpg




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quik_d
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PostPosted: 23:31 - 18 Oct 2006    Post subject: Reply with quote

....and the only undamaged bit...... The R & G crash Bungs Rolling Eyes

steveh wrote:
i did it on friday the 13th, was great, came right out HUGEE skid mark all the way round the corner, near full lock on the bars, great rush.........



until....



https://img92.imageshack.us/img92/6541/photo0008cn9.th.jpg




Wink

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