Wheelie / Stoppie physics

[Mattyc]

It's a bit of a heifer though [Courtesy of Hitcher's Editing Services, a wholly-owned subsidiary of English As A First Language Ltd]

cheers Hitcher, least you knew what i meant

[Marmoot]

A wheelie is caused by the jet of exhaust gas that overcomes the weight of the front.
That is why wheelies are normally done at high RPM, so that the exhaust emission is at higher speed and provides higher thrust. And this is also why wheelies are easier done on sportsbike, due to the exhaust pipe angled upwards, pushing the rear of the bike down and lifting the front up (see: Momentum and Power-Coupling) in a similar way an end of a see-saw move upwards if you push the other end down.

Stoppies, on the other hand, has nothing to do with exhaust gas. It happens normally when a rider is bold enough to properly decelerate as hard as he can. As long as front tyre traction is not exceeded, the front wheel will not lock up causing the bike to crash.
When the rider is bold enough, it is normally caused by a surge in testosterone level (testosterone causing man-ego and desire to impress). This surge of hormone in the glandular area increases the liquid mass up to the n-th degree. When the courage generated induces braking, the liquid mass sloshes front-ward, causing frontward momentum. This momentum is normally above the bike's centre-of-gravity, and combined with steep steering angle of sportbikes this momentum causes another power-coupling similar to wheelie but to the other direction (refer to: Clockwise and Anti-clockwise) and pushes the front down while lifting the rear up.

I hope that explains how wheelie and stoppie happens, and why it is much easier to induce them on sportsbike.

[TwoSeven]

My question is - if your riding a motorcycle in reverse and you hit the rear brake causing the front wheel to lift - is that a wheelie or a stoppie ?

[avgas]

My question is - if your riding a motorcycle in reverse and you hit the rear brake causing the front wheel to lift - is that a wheelie or a stoppie ?

Stoppie....cos you stopped

[crash harry]

My question is - if your riding a motorcycle in reverse and you hit the rear brake causing the front wheel to lift - is that a wheelie or a stoppie ?

I think that needs a new name... I think if I did it my audience would call it "Oh look, he's crashed his bike!", whereas I would call it "Aaarrrgh!!! Get this thing offa me!"

[crash harry]

crash harry, why the hell are you on about the moon now?

Do I need a reason to talk about the moon? I like the moon.

Okay, I'm having one of those weeks where I don't make much sense apparently. I thought I'd inflict it on KB for some reason.

[skidMark]

i wouldve thought it would be something to do with traction i mean you lean out the back a) the COG is further back and b) more traction on back so instead of slipping with all the power it forces to hard that it lifts the front wheel i mean if you have enough traction and power you can wheelie anything

you can have all the power in the world....but with no traction youll just be smoking your tyres lol

don't care about the physics really they r just a hell load of fun to do

[Hitcher]

Everybody thinks they're Stephen Fucking Hawking.

[sAsLEX]

Everybody thinks they're Stephen Fucking Hawking.

wHo isked u?! iF wE wants you're oppionion we wud aks for it

[skidMark]

wHo isked u?! iF wE wants you're oppionion we wud aks for it

but he has a cool avatar and for that alone his posts are valid even though it's rather sad but in some way impressive he has over 6000 posts lol

[Mental Trousers]

Momentum tries to preserve the current state of something, so if you give a bike some thrust forward, momentum will always push backwards and vice versa. Laws of Energy Conservation blah.

[Mattyc]

while you guys have been blithering on i have been out doing wheelies, its as simple as this pull in the clutch a little, rev the bitch, drop clutch, twist throttle, maintainin balance on back wheel until asshole starts to pucker slowly ease it down with the throttle in an effort to not crush your nuts.\

Not game for stoppies on the zx9 til i get some oggy's fitted, on the mx bike they are easy as shit, slam on the front brake while sort of pushing down and back on the pegs , forward on the bars - sort of hard to explain, i pulse the front brake and roll a little ....

I really can't see what all the fucken blithering is about - just go try them

:spudbooge :eyepoke:

[Marmoot]

you can have all the power in the world....but with no traction youll just be smoking your tyres lol

don't care about the physics really they r just a hell load of fun to do

bah....you can have all the power in the world and all the traction you can get, but without the exhaust gas jet pointed upwards you'll just accelerate like a bullet. :eyepoke:

[Marmoot]

Not game for stoppies on the zx9 til i get some oggy's fitted, on the mx bike they are easy as shit, slam on the front brake while sort of pushing down and back on the pegs , forward on the bars - sort of hard to explain, i pulse the front brake and roll a little ....

I really can't see what all the fucken blithering is about - just go try them

:spudbooge :eyepoke:

And this one.....without significant testicular fluid motion you will not be able to do stoppies as there is not enough momentum to help the bike.
That's why when someone did massive stoppies, especially in unfavourable surface, people would normally utter "Gosh, he has BIG balls" due to him controlling bigger glandular liquid ability.

And that's why more guys do stoppies than girls, although lactating glands can also be utilized to help in abscense of testicular equipment, albeit being harder to control due to longer momentum arm distance (located further from bike's Centre of Gravity).

[Mattyc]

And this one.....without significant testicular fluid motion you will not be able to do stoppies as there is not enough momentum to help the bike.
That's why when someone did massive stoppies, especially in unfavourable surface, people would normally utter "Gosh, he has BIG balls" due to him controlling bigger glandular liquid ability.

And that's why more guys do stoppies than girls, although lactating glands can also be utilized to help in abscense of testicular equipment, albeit being harder to control due to longer momentum arm distance (located further from bike's Centre of Gravity).

I Concurr!!!!!!!!!!!!!!!!!!!