Whats YOUR Max Lean Angle? - ZX6R Forum
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post #1 of 63 Old 07-17-2018, 06:27 PM Thread Starter
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Whats YOUR Max Lean Angle?

I was in a discussion at work about MotoGP and I was asked the question about my own personal max lean angle achieved. Well, needless to say, this both dumbfounded and intrigued me as to what angles im hitting on a regular track day. (I only track day a few times a year, not racing).

So, out of curiousity, I'm wondering what maximum lean angles are on our common street/track tires and what you guys are hitting as well and on what tires... WITHOUT crashing. This is just for a bit of fun and in no way intended to cause a wee-wee sizing contest like my google research has uncovered in other forums.

NOTE: I took a sheet of paper and traced the angle and used this online protractor to figure the angle https://www.visnos.com/demos/basic-angles

I figured out the attached is a 46 deg angle of attack by the bike on Q3s on my 2007 zx6r.

edit: 44 deg if minus from 90, using 0 as the perfect vertical
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Current Bike (07 ZX6R - silver / maroon): K&N air filter, K&N oil filter, Scotts steering damper, Spiegler front brake lines (orig over fender setup, neon red lines w/ nat. alum banjos), shogun sliders (side/bar end/rear axle), some stickers, some tank grips, Puig windscreen (clear), rear seat cowl, Q4 tires, 1ea staple gun staple (jumper mod), suspension set to ME

My track day vid's thread on ZX6R.com

Last edited by Knotty Boy; 07-19-2018 at 10:13 PM.
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post #2 of 63 Old 07-17-2018, 06:38 PM
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I think Im hitting pretty close to 58-60
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post #3 of 63 Old 07-17-2018, 06:44 PM Thread Starter
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and see, that's the hardest part... figuring it out. I happened to have a pretty straight-on perspective pic of myself to use but without that, im not calculus-ish/geometric-ish enough of a mathematician to figure it out. Before my first track day pics, I was under the impression I was much lower...

I imagine everyone feels like this until they get that little bit of extra reach down and do the whole knee-drag thing for the first time. I guess for ME it was very much of a milestone in my life of owning a sportbike and finally being able to relate to what I hear about and see on tv via the pros. (pats self on back) lol

Current Bike (07 ZX6R - silver / maroon): K&N air filter, K&N oil filter, Scotts steering damper, Spiegler front brake lines (orig over fender setup, neon red lines w/ nat. alum banjos), shogun sliders (side/bar end/rear axle), some stickers, some tank grips, Puig windscreen (clear), rear seat cowl, Q4 tires, 1ea staple gun staple (jumper mod), suspension set to ME

My track day vid's thread on ZX6R.com

Last edited by Knotty Boy; 07-17-2018 at 10:04 PM.
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post #4 of 63 Old 07-17-2018, 06:53 PM
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I don't know, never measured it. But my guess based on pics and based on following others at the track who did have an inclinometer (yes that's a thing) built into their data loggers on their bikes, while having very similar body position and pace as me...I reckon about 55ish. That's on any tires really and most bikes I've ridden at the track. Lean angle is no different. Those last few degrees is what separates the pros from the rest of us. MotoAmerica, BSB, WSBK pros are usually at about 60-62 degrees. MotoGP guys will hit 64-65 degrees, but they're also on tires and bikes that none of us can really get.
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post #5 of 63 Old 07-17-2018, 07:16 PM Thread Starter
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I know the Garmin action cam software captures it, and based on the "inclinometer" (which I thought was only in aviation) I've discovered theres something called a "Leanometer" as well ( Leanometer - Product )

Cool stuff.

Current Bike (07 ZX6R - silver / maroon): K&N air filter, K&N oil filter, Scotts steering damper, Spiegler front brake lines (orig over fender setup, neon red lines w/ nat. alum banjos), shogun sliders (side/bar end/rear axle), some stickers, some tank grips, Puig windscreen (clear), rear seat cowl, Q4 tires, 1ea staple gun staple (jumper mod), suspension set to ME

My track day vid's thread on ZX6R.com
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post #6 of 63 Old 07-17-2018, 07:26 PM
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Lean angle.

Two different one's. In my mind, elbows about to touch.
Pictures say, HA, HA.
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post #7 of 63 Old 07-17-2018, 10:25 PM
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I've achieved 90 . My bike and I were sliding parallel to the ground .

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post #8 of 63 Old 07-17-2018, 10:33 PM Thread Starter
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Quote:
Originally Posted by Knotty Boy View Post
... I'm wondering what maximum lean angles are on our common street/track tires and what you guys are hitting as well and on what tires... WITHOUT crashing.
Quote:
Originally Posted by jd41 View Post
I've achieved 90 . My bike and I were sliding parallel to the ground .

Current Bike (07 ZX6R - silver / maroon): K&N air filter, K&N oil filter, Scotts steering damper, Spiegler front brake lines (orig over fender setup, neon red lines w/ nat. alum banjos), shogun sliders (side/bar end/rear axle), some stickers, some tank grips, Puig windscreen (clear), rear seat cowl, Q4 tires, 1ea staple gun staple (jumper mod), suspension set to ME

My track day vid's thread on ZX6R.com
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post #9 of 63 Old 07-17-2018, 10:54 PM
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Well this is disappointing. I calculated only about 47. Sure feels like more

Dunlop Q3

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post #10 of 63 Old 07-18-2018, 01:04 AM
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I know of two ways to measure accurately

1). Harry’s Lap Timer. Runs on iOS devices - measures lap times, sector times, acceleration and lean angles. Basic app is free I think (maybe a few $) and you just have to go carry it with you during a session

2) a dedicated telemetry device. I bought a gadget called a “brain dose” from an Italian company on Kickstarter. Does basically the same thing as Harry’s with a few additions - 20hz instead of 1hz as on an iPhone, and plots your laps against a Google Maps background. Also promised a bunch of extra cool stuff that currently doesn’t work.

But regarding lean angles, I’m generally in the 46-48 degree range but think that if I had bigger cajones then the Q4’s I just put on could take me to at least upper 50’s
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post #11 of 63 Old 07-18-2018, 04:31 AM
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Quote:
Originally Posted by jd41 View Post
Well this is disappointing. I calculated only about 47. Sure feels like more

Although that looks about right, it's not an accurate way of measuring it because the pic is not taken from directly in front of you. If you can see any side of the bike or the tail, it's not a good example for drawing lines on it and measuring like you did.

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post #12 of 63 Old 07-18-2018, 04:33 AM
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Anyone care to calculate that one? It isnt max but at least pretty close.



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post #13 of 63 Old 07-18-2018, 04:34 AM
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Quote:
Originally Posted by russperry View Post

But regarding lean angles, Im generally in the 46-48 degree range but think that if I had bigger cajones then the Q4s I just put on could take me to at least upper 50s
Yeah, don't we all lol...if we all had bigger cajones we'd all be racing in MotoAmerica at least and wouldn't be talking about lean angles on a forum lol

I can tell you it's not the tires though. I tried to look for a pic I saw a while back, but couldn't find it, of one of the kids around here that I race with who was dragging his elbow on his ninja 300...IN THE FUCKIN RAIN!!! And he didn't crash, in fact he was running about 4-5 seconds slower only than his dry times! lol
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post #14 of 63 Old 07-18-2018, 07:59 AM
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Quote:
Originally Posted by sbk1198 View Post
Although that looks about right, it's not an accurate way of measuring it because the pic is not taken from directly in front of you. If you can see any side of the bike or the tail, it's not a good example for drawing lines on it and measuring like you did.
I agree with you but it's just a guess since I couldn't find any pictures shot with me directly in front of the camera.

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post #15 of 63 Old 07-18-2018, 10:02 AM
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Lean angle is for pussies -




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