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do kneedowns actually make you quicker?

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damz
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PostPosted: 00:52 - 03 Aug 2009    Post subject: do kneedowns actually make you quicker? Reply with quote

everyone seems to talk about getting kneedowns as if its loosing your virginity but so far on the roads iv'e found very little purpose for it, i can lean stupid ammounts and get around corners very fast without my knee's even touching the ground.

the only time iv'e bothered to do kneedowns were on roundabouts to scrub in new tyres as i felt it would be better to do it at low more controlled speeds than loosing it on a fast bend.

anyway does doing a kneedown actually make your corner faster on public roads?
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The Artist
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PostPosted: 00:56 - 03 Aug 2009    Post subject: Reply with quote

Kneedown is just a term for a degree that you are leaning.

So in essence, kneedown is your leaning limit, leaning more means you can go faster around corners.

Not necessary on the roads really.
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chris-red
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PostPosted: 01:11 - 03 Aug 2009    Post subject: Reply with quote

allymoss wrote:
Kneedown is just a term for a degree that you are leaning.

Actually thats shit.


So in essence, kneedown is your leaning limit, leaning more means you can go faster around corners.


I can judge the angle of my lean using my toe.


Not necessary on the roads really.

I agree







KD is about hanging off the bike and moving the CoG closer to the turn to turn quicker, true you can judge the lean but that is minimal compared to weight transfer.
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johnsmith222
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PostPosted: 01:26 - 03 Aug 2009    Post subject: Reply with quote

I have seen some really quick riders who don't really lean off their bike.

It put the whole kneedown thing into perspective for me.

you were pretty quick round bends anyway when I was out with you so I don't think you have anything to worry about.

Fancy a run on Wednesday afternoon?
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damz
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PostPosted: 02:03 - 03 Aug 2009    Post subject: Reply with quote

david_m213 wrote:
I have seen some really quick riders who don't really lean off their bike.

It put the whole kneedown thing into perspective for me.

you were pretty quick round bends anyway when I was out with you so I don't think you have anything to worry about.

Fancy a run on Wednesday afternoon?


yeh should be free tomoz and wed, then im off to england and new york for a couple of weeks. need to make sure i get back in time for work next time though as the dayshift guy was a bit pissed off lol.

just hope the good weather stays on for a few more days, went out for a wee run down to louden castle before work but pizza hut gear isnt that great so didnt want to see how they hold out in a crash.




anyway back on topic, my bikes pretty nimble and have had it leant right over to the edge on many occasions (no doubt it will probobly lean even more) without having to stick out my knee. the position i seem to take on heavy leaning is my helmet pretty much touching the mirror, half an ass and thigh on the seat and my other leg pushed forward so my knee is about half a foot diagonally down. probobly helps that the V4 means the bike is quite narrow, the seat is basically at its widest point.
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Kickstart
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PostPosted: 07:55 - 03 Aug 2009    Post subject: Reply with quote

Hi

Depends on why you have you knee down.

Those who are hanging off like a monkey just to get their knee down are probably going a lot slower than they could.

Those leaning over hard and just hanging off a bit are getting their knee down due to their speed.

All the best

Keith
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Wafer_Thin_Ham
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PostPosted: 08:02 - 03 Aug 2009    Post subject: Reply with quote

Probably not, but the process of learning to get your knee down improves your confidence vastly.
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supZ
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PostPosted: 08:02 - 03 Aug 2009    Post subject: Re: do kneedowns actually make you quicker? Reply with quote

Damz wrote:
anyway does doing a kneedown actually make your corner faster on public roads?

public road or track tbh.. in a word.. no.

as said above, if you're 'trying' to KD you'll most likely be going a lot slower than someone who has the right amount of hang off and is just trying to get round the corner.

in short if you wanna go fast round a corner just make sure your body position is right and you're looking where you wanna go, if it happens it happens.. it should be a byproduct, not the aim of what you're doing (your aim should be getting round the corner Smile)
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Bofh5
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PostPosted: 08:05 - 03 Aug 2009    Post subject: Reply with quote

Do a track day and you'll find out why using your knee helps.

When i started i was decking the pegs after a lap once the tyres were warm and the bike started to feel really unstable like it was on the limit but i was still going wide !

After a few more sessions i relaxed and just started sliding of the seat looking where i wanted to go and found my turning was a lot better with the difference in weight balance.

As a by-product so to speak i started scraping my knees on the corners and the confidence boost was incredible.

Remember the greater the lean angle the less tyre is in contact with the road / track so less grip.
If you can keep a greater contact patch by using your body to increase the turn in then all the better plus you can get on the throttle faster.

Sorry this isn't the best way to explain but hopefully you catch my drift Smile
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Tome
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PostPosted: 08:17 - 03 Aug 2009    Post subject: Reply with quote

Bofh5 wrote:

As a by-product so to speak i started scraping my knees on the corners and the confidence boost was incredible.

I heard this once and it seemed to make sense to me. You get your knee down when your going fast, not necessarily to go fast.

Obviously when getting technical and talking about leaning to move your CoG etc it's not that simple lol.
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Luke_Retrofly
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PostPosted: 08:21 - 03 Aug 2009    Post subject: Reply with quote

Knee down in essence has nothing to do with speed. Its a process of judging how far you are leant over. Everyones styles different, so how much you GYKD differs from person to person. But its a good judge of how far your leaning/pushing the bike.

Weight distribution, ie moving your weight towards the inside of the corner does let go quicker, it allows the bike to go around the corner quicker without increasing lean angle, there is a maximum lean angle of a bike, after which you will lose grip, shifting your weight to the inside allows you to be on this limit but going faster around the corner than if you were sat upright on your bike, one of the ways of doing this is sticking your body/head/elbow/knee out, which eventually hit the floor Smile

On track with decent tryes and grip levels bikes lean so far that the distance between the bike and ground is so small you can't stick anything out, yet your bum, head and elbow will be still offset to the inside.

As you can see Rossi's whole body is offset to the right of the bike, this I think it most important factor when leaning for extra speed, not just sticking your knee out.
https://www.humanartifact.com/image/proracing/20090429_67degreeLeanRossiChinaFP.png

Note heads/bodies and elbows all leaning into the corner, also note No#26 bike, his knee is sandwiched between the road and bike
https://www.superbikeplanet.com/image/2007/mgp/mugello/1/9.jpg

Obviously these are extreme examples, but the principles are the same, these techniques are best practiced on race tracks Smile


Last edited by Luke_Retrofly on 08:23 - 03 Aug 2009; edited 1 time in total
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Cptn. Awesome
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PostPosted: 08:22 - 03 Aug 2009    Post subject: Reply with quote

Bofh5 wrote:
Do a track day and you'll find out why using your knee helps.

When i started i was decking the pegs after a lap once the tyres were warm and the bike started to feel really unstable like it was on the limit but i was still going wide !

After a few more sessions i relaxed and just started sliding of the seat looking where i wanted to go and found my turning was a lot better with the difference in weight balance.

As a by-product so to speak i started scraping my knees on the corners and the confidence boost was incredible.

Remember the greater the lean angle the less tyre is in contact with the road / track so less grip.
If you can keep a greater contact patch by using your body to increase the turn in then all the better plus you can get on the throttle faster.

Sorry this isn't the best way to explain but hopefully you catch my drift Smile


I thought you explained it pretty well. Thumbs Up

My two pence: On the road you don't really need to get you knee down unless your into the realms of dangerous riding, I'm thinking hooning it round mountain roads and using both sides of the road where potentially oncoming traffic could turn you into road-jam.

I also agree with the POV that KN is a by-product of speed and shifting weight.
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