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How to Stop a Fishtail

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dragstaar
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PostPosted: 13:08 - 15 Sep 2010    Post subject: How to Stop a Fishtail Reply with quote

I came off my bike yesterday, with the missus on the back. Ridiculously wet road, coming round a roundabout at 25mph, back wheel started fishtailing, tried to control it but couldnt. Went flying.

Now how could i have recovered from the fishtail. i'm sitting here with a cricked neck, thinking about what i could have done. Is it even possible to recover from a fishtail with a pillion? How would i do without a pillion?
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Paulington
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PostPosted: 13:21 - 15 Sep 2010    Post subject: Reply with quote

I'd hazard a guess at what I would do is keep on the throttle and steer into the slide, almost in the same way as a car.

That gives the bike time to recover and as you stay on the throttle the rear isn't going to lock up and spit you off.

The way I see it that gives you two outcomes, a relatively large drift and regained control or you just drop it to your side.

I may be TOTALLY wrong, but that's what I've done and it's worked so far. Everyone and every bike is different.
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pepperami
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PostPosted: 13:21 - 15 Sep 2010    Post subject: Reply with quote

Was it due to diesel spillage? as there would possibly be nothing you could of done about that.

when i`ve had a fishtail (on grass admittedly) , if I had time to re-act then it would be let off the front brake a bit and apply a touch more back brake, then power back on.
I found that a lot of the time it was caused by hard braking causing the rear end trying get ahead of the front end.
That was if I had the time to do it, as usually it happened so quick that it was all over before I had a chance to even think about it let alone re-act.

Worked for me a few times Thumbs Up
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chris-red
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PostPosted: 13:26 - 15 Sep 2010    Post subject: Reply with quote

Pull in the clutch and let off of the rear brake. The only reason you would fish tail is when the rear wheel has lost traction because it is spinning too fast or not fast enough to keep up with the road.


The only time I have every dropped the bike because of a fishtail was going down hill on ice. Every other time they have been easily controllable.
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Dazbo666
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PostPosted: 13:34 - 15 Sep 2010    Post subject: Reply with quote

From memory I've had 2 fairly major, and one minor rear wheel slide in the last couple of years, and thankfully managed to keep the bike upright, avoiding getting a faceful of tarmac.

They happened extremely quickly, and I firmly believe that my previous experience with offroad mountainbiking helped to some extent...

I remember managing to steer in to the slide (as Paulington mentioned), as well as lifting off the seat by pressing down on the pegs - essentially lowering the centre of gravity.

I can't say that this is the definitive or the correct way to deal with it, because it all happens so quickly it was purely an instinctive reaction... but it worked for me Thumbs Up
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SamJL
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PostPosted: 13:38 - 15 Sep 2010    Post subject: Reply with quote

Get a Motocross bike, you will soon learn how to control rear wheel slides in no time. In fact, you will start doing them for fun in the wet Very Happy

I have a habit of doing slides out of roundabouts in the wet, great fun Thumbs Up

Just don't let off the throttle to violently if you want to bring it back, gradually let off, until you have got it back in line. Steer in to it a little bit as well!

I'm rubbish at explaining things! Get on a Motocross bike, you will learn how to control slides.
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Last edited by SamJL on 13:42 - 15 Sep 2010; edited 1 time in total
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Paxovasa
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PostPosted: 13:41 - 15 Sep 2010    Post subject: Reply with quote

SamJL wrote:
Get a Motocross bike, you will soon learn how to control rear wheel slides in no time. In fact, you will start doing them for fun in the wet Very Happy

I have a habit of doing slides out of roundabouts in the wet, great fun Thumbs Up

Just don't let off the throttle to violently if you want to bring it back, gradually let off, until you have got it back in line.



Power through them Very Happy
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SamJL
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PostPosted: 13:43 - 15 Sep 2010    Post subject: Reply with quote

Powering through is more fun, and you can get a nice long slide down the road as well, although the people behind you will think your going to die Very Happy
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robbieguy2003
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PostPosted: 15:19 - 15 Sep 2010    Post subject: Reply with quote

I want a motocross bike! I think it'd be ace. I can control slides in a car without an issue (slow speed, my balls dont allow me to do high speed ones). But (again) due to balls, i've really not wanted to purposely slide the bike (certainly on corners).
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Hetzer
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PostPosted: 15:22 - 15 Sep 2010    Post subject: Reply with quote

Keep the power on, or more power, and ride through it. You'll either low-side or make it.
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robbieguy2003
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PostPosted: 15:39 - 15 Sep 2010    Post subject: Reply with quote

Quote:

Keep the power on, or more power, and ride through it. You'll either low-side or make it.


With keeping the power on, is there still a fine line between highside and lowside? i.e. you get quicker and quicker then the wheel regrains tractions and throws you? If you're hanging off the bike (opposing the corner force), does that help if it regrips?
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chris-red
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PostPosted: 15:40 - 15 Sep 2010    Post subject: Reply with quote

Why are people talking about powering through it, the guy said fishtail, i.e. the back sliding left to right, powering through will only make it worse.
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Hetzer
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PostPosted: 15:49 - 15 Sep 2010    Post subject: Reply with quote

robbieguy2003 wrote:
Quote:

Keep the power on, or more power, and ride through it. You'll either low-side or make it.


With keeping the power on, is there still a fine line between highside and lowside? i.e. you get quicker and quicker then the wheel regrains tractions and throws you? If you're hanging off the bike (opposing the corner force), does that help if it regrips?


There's a chance, but in the wet it's not huge. Bigger chance though if you chop the power. I view it as keeping the tyre 'live' vs 'dead'; if it 'dies', you drop. Laughing
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robbieguy2003
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PostPosted: 15:55 - 15 Sep 2010    Post subject: Reply with quote

Yeah thats good advice, cheers, I agree with not chopping the power. For the last year or two i've been religiously training myself to never do that regardless of good/bad weather, it just keeps the bike more stable in corners.
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swiftb
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PostPosted: 15:57 - 15 Sep 2010    Post subject: Reply with quote

chris-red wrote:
Why are people talking about powering through it, the guy said fishtail, i.e. the back sliding left to right, powering through will only make it worse.


It possibly depends how powerful the bike is really, from experience on a trail bike I would say its a case of loosening up and powering through, let the bike sort itself out, trying to wrestle in generally makes it worse although can work in some cases. I used to stand up lean my weight forward and keep on the gas and the bike would straigthen up (this was however a fairly low powered traily)
Never had a real fishtailing incident on my roadbike but had many in cars and again from experience, letting off the gas in a fishtailing 400bhp rear wheel drive car was almost a drastic decision, in fact giving it the lead foot and letting the car sort itself out instead of frantically trying to wrestle it was how it finally ended in much laughter rather than tears.
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Paxovasa
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PostPosted: 16:03 - 15 Sep 2010    Post subject: Reply with quote

chris-red wrote:
Why are people talking about powering through it, the guy said fishtail, i.e. the back sliding left to right, powering through will only make it worse.


Because easing off the power can cause the bike to grip and then throw you off.
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robbieguy2003
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PostPosted: 16:05 - 15 Sep 2010    Post subject: Reply with quote

I think Chris is getting at the point of a fishtail is the back skidding when the bike is in a straight line, which is quite controllable.

What everyone else is going on about is the back coming out when cornering.

I think the confusion is because the original poster said he was coming round a roundabout at 25mph which would indicate he might not have been in a straight line at the time.

Still confusing though Thumbs Up
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G
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PostPosted: 16:12 - 15 Sep 2010    Post subject: Reply with quote

Yes; clarification if it was a 'fish tail' (going from one side to the other continually) or just a slide, possibly snapping back the other way once.
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chris-red
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PostPosted: 16:18 - 15 Sep 2010    Post subject: Reply with quote

Paxovasa wrote:
chris-red wrote:
Why are people talking about powering through it, the guy said fishtail, i.e. the back sliding left to right, powering through will only make it worse.


Because easing off the power can cause the bike to grip and then throw you off.




Not if you are on the clutch.
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mistergixer
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PostPosted: 18:18 - 15 Sep 2010    Post subject: Reply with quote

Aye, i think we need clarification from the OP.

Until then, here's my 2p:

Giving it less gas on the exit would be the easiest way to control (avoid) the slide, although that's a tad boring. Another vote for trying to slide through it.

Wink

If it's a straightline snake of the rear end, i would be trying to gently ease off until the rear regained some semblance of grip. Snapping the throttle shut is not advisable.

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TUG
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PostPosted: 19:31 - 15 Sep 2010    Post subject: Reply with quote

chris-red wrote:
Why are people talking about powering through it, the guy said fishtail, i.e. the back sliding left to right, powering through will only make it worse.

Thats not true, its like a caravan fish tailing, you have to power on.

I had one once with the GF at the time on the back braking for a bend, i just applied a bit more power with the rear and front brakes lightly pressed. it sorted itself out. Key is to not panic, you paniced and crashed.
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chris-red
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PostPosted: 20:37 - 15 Sep 2010    Post subject: Reply with quote

TUG wrote:
chris-red wrote:
Why are people talking about powering through it, the guy said fishtail, i.e. the back sliding left to right, powering through will only make it worse.

Thats not true, its like a caravan fish tailing, you have to power on.

I had one once with the GF at the time on the back braking for a bend, i just applied a bit more power with the rear and front brakes lightly pressed. it sorted itself out. Key is to not panic, you paniced and crashed.


No it isn't, the caravans wheels aren't being powered and I doubt it's wheels are losing tracton it just has a wobble on, if a bike is fishtailing it is because the rear is spinning too fast or too slow, in my mind the best way to stop this is get the bike neutral no power or brakes to the wheels lets it sort it's self out.

It depends by what people mean by fishtail in my eyes a fish tail is the rear mooving left to right, funnily enough like a fishes tail. Like when you put to much power down in the wet or you change down too many gears, if he just means the rear stepping out it is not a fishtail.
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dragstaar
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PostPosted: 22:39 - 15 Sep 2010    Post subject: Reply with quote

I apologise for the confusion. Chis-red is right. thats what i meant by fishtail, a really quick side to side motion like a fish

chris-red wrote:

It depends by what people mean by fishtail in my eyes a fish tail is the rear mooving left to right, funnily enough like a fishes tail. Like when you put to much power down in the wet or you change down too many gears, if he just means the rear stepping out it is not a fishtail.


I had finally managed to master controlling a slide, i just let off the back brake and give it a tiiiiiiny bit of throttle and she comes back, so the slide i can handle, but this was a proper full on fishtailing, bloody back wheel going beserk.

So let me clarify the situation i had yesterday. I was coming round the rather large roundabout (the one under the croydon flyover if anyone knows it), and it was wet, and i dont know what set me off, possible diesel, possible wet leaves, i couldnt see because it happened just as i went under the flyover so it was too dark.

From what i remember (and i remember only a few details) i was slightly leaning when it started, but i straightened out, and i was fishtailing, i.e. side to side, and i'm pretty sure i cut off the throttle. i suppose thats where i went wrong, its so difficult to train yourself not to do that though isn't it. You just panic, and thats what i did and ruined my bike, and my neck, and my missus Sad
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chris-red
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PostPosted: 22:46 - 15 Sep 2010    Post subject: Reply with quote

dragstaar wrote:
I apologise for the confusion. Chis-red is right. thats what i meant by fishtail, a really quick side to side motion like a fish

chris-red wrote:

It depends by what people mean by fishtail in my eyes a fish tail is the rear mooving left to right, funnily enough like a fishes tail. Like when you put to much power down in the wet or you change down too many gears, if he just means the rear stepping out it is not a fishtail.


I had finally managed to master controlling a slide, i just let off the back brake and give it a tiiiiiiny bit of throttle and she comes back, so the slide i can handle, but this was a proper full on fishtailing, bloody back wheel going beserk.

So let me clarify the situation i had yesterday. I was coming round the rather large roundabout (the one under the croydon flyover if anyone knows it), and it was wet, and i dont know what set me off, possible diesel, possible wet leaves, i couldnt see because it happened just as i went under the flyover so it was too dark.

From what i remember (and i remember only a few details) i was slightly leaning when it started, but i straightened out, and i was fishtailing, i.e. side to side, and i'm pretty sure i cut off the throttle. i suppose thats where i went wrong, its so difficult to train yourself not to do that though isn't it. You just panic, and thats what i did and ruined my bike, and my neck, and my missus Sad


I would have been on the clutch, that would have been better than rolling off but I wouldn;t go so far as to say it would have stopped the crash, It sounds like diesel a bike should do that even in the wet.
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dragstaar
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PostPosted: 22:55 - 15 Sep 2010    Post subject: Reply with quote

Hmmm, yeah, i suppose a reduction in power to the back wheen would have helped.

But would i have been more likely to recover from it if i didnt have my gf on the back? She's not exactly the most experienced pillion, and i thought that maybe her unbalance could have set me off. and would her inexperience mean that he imbalance would stop me pulling back the fishtail?
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