wheelies 101

[CatatonicBug]

The internals of the engine rotate like a log rolling toward the rear of the bike. Standing on the kickstand-side, it is rotating clockwise. The thrust of this motion pushes the case and frame in the opposite direction, pushing the front wheel downward, and lifting the rear.

[trbig]

... Deleted.

[BA80]

The engine does rotate towards the rear of the bike torquing the front down which is completely opposite of others that torque towards the front torquing the front upwards. The case will try it's hardest to turn in the opposite direction of crankshaft rotation.

Ride a Suzuki or Kawasaki 1000 or 1100 and see how easy it is to pull the front wheel up. It's not because they have more power it's because the engine torque lifts the front.

You see drag cars when they take off from the line and the left front wheel lifts? That's because the engine is turning to the left and the engine block is trying to spin to the right and actually twists the frame.

[motoman]

I've read this a couple times now and it makes no sense. The motor rotates backwards, meaning clockwise, meaning it's spinning a direction that would be more inclined to RAISE the front from torque. Is this just one of those rumors that someone heard and ran with it?

Also, what makes the rear want to rise has nothing to do with the motor, but the gears trying to climb up each other.

+1, dead-on..........pinion gear is trying to climb the ring gear and that force pushes the suspension up......................and if U got a mid 11sec. car the right wheel will lift.........and a good 'hookup' both get air.....

[BA80]

+1, dead-on..........pinion gear is trying to climb the ring gear and that force pushes the suspension up......................and if U got a mid 11sec. car the right wheel will lift.........and a good 'hookup' both get air.....

I agree about the suspension our engines turn on a different axis than a car. Here's a video of my manager where I works' white S10. If you watch closely the right wheel lifts before the other one. http://youtu.be/6LjMJgTj48A .

We HAVE 11 second bikes, in therory I've never made a run to find out, so by what your saying we should be able to pull the wheel easily because the suspnsion smashing that rear wheel into the ground certainly gives you a "hook up" just like a set of traction bars, and we should except we are fighting engine torque. I think it is a helluva design myself.

[WMarshy]

...so by what your saying we should be able to pull the wheel easily because the suspnsion smashing that rear wheel into the ground certainly gives you a "hook up" just like a set of traction bars, and we should except we are fighting engine torque. I think it is a helluva design myself.

It is easy to bring the front up... originally I didnt think so but I've since chanced my mind after doing it accidentally. Then I practiced it on purpose and found its relatively easy, it just takes some clutch control and balls that clang b/c its a little hary with that much weight on one wheel. From a rolling start, 2000 to 2500 rpm in first, pull the clutch 3/4 in wrap the rpm up to 6000 and drop it.

[BA80]

Yup, popping the clutch will do it, not quite as easily with the taller gears in the FD but doable. The horsepower will overcome the downward torque.

Not trying to argue or anything but anyone with the knowledge of the effects of torque will have to agree that with the engine turning the direction it does will torque the front of the engine down and since the engine is attached to the frame it will have an affect on pulling the front up. That is simple physics.

[motoman]

I agree about the suspension our engines turn on a different axis than a car. Here's a video of my manager where I works' white S10. If you watch closely the right wheel lifts before the other one. http://youtu.be/6LjMJgTj48A .

We HAVE 11 second bikes, in therory I've never made a run to find out, so by what your saying we should be able to pull the wheel easily because the suspnsion smashing that rear wheel into the ground certainly gives you a "hook up" just like a set of traction bars, and we should except we are fighting engine torque. I think it is a helluva design myself.

That it is Greg, whether by design or all just worked out that way,that torque is definitely ALL transfered to where the tire meets the pavement. The 'boat' the Venturer is compared to a 'naked' Special definitely shows at the end of the 1320. Barn door and rest of the baggage, after doin the tranny fix pounded out three hard runs at the local 1320 here and high 13's @ just under 100mph, That was with having .420react times and at 4800ft.elev. Likely sea-level runs could knock another half second of that and maybe even a whole second considering my clutch would 'turn loose' a bit midway into third. Anyway, just did that for a test to see if my fix was gonna hold with 8500rpm full throttle held speed shifts. Twas fun, made me miss the winning days at the strip with my 64Goat/70RamAir IV Judge motor.

[BA80]

8500rpm full throttle held speed shifts.

That's EXACTLY what did in my second gear. Missed it once too many times.

But when I catch it it will pull the front wheel a few inches even with the 850 FD.

[motoman]

That's EXACTLY what did in my second gear. Missed it once too many times.

But when I catch it it will pull the front wheel a few inches even with the 850 FD.

Stock gearing two-up, even carries a ways in second, and full dresser to boot, but that was a couple decades ago performing these kinda antics giving no thought to the actual abuse created. Tods pictures show exactly how all that finially takes a toll on vital parts.

[trbig]

8500rpm full throttle held speed shifts.

Power curve starts dropping earlier than that. It fallas off pretty good after @ 7500. I like to keep it in the 6k to @ 7300, but it actually peaks on a dyno in stock form just under 7k.

So.. you might have got that extra half second riding it in the zone.. assuming the Venturer is similar.

[motoman]

Power curve starts dropping earlier than that. It fallas off pretty good after @ 7500. I like to keep it in the 6k to @ 7300, but it actually peaks on a dyno in stock form just under 7k.

So.. you might have got that extra half second riding it in the zone.. assuming the Venturer is similar.

Very true, and havin' to go to fourth in the area of 100yds. short of finish and that barn door with the taller than stock 25" windshield arguing with mother nature made it work hard by then with slowed up gains by then.

[trbig]

Ehh... Some of US are as big as barn doors and push almost as much wind on a naked bike as that fairing. With the old Shoei fairing I had on, it actually gave me a higher top end and better MPG than no fairing. It cut the wind really well. It was broken in several pieces.. it and guardrails don't play well together. I have a guy that has been SLLLLLOOOOOWWWWLLLLY putting it back together, but he has a new kid with another on the way and hasn't had a lot of time to work on it. They are apparently like hens teeth though. I tried calling Shoei and asking for some parts (A new turn signal) and got a kid saying, "We don't make fairings, we just make helmets.." Finally talked to one of the old hands in the back shop and was told they haven't made fairings in over 20 years. I found where I can buy a new OEM one, but they're @ $450 and they only had a white and some other color, so I'd have to get it painted on top of that cost. This is a pic of it on the bike when I actually would clean and polish the bike occasionally. lol.

[motoman]

Ehh... Some of US are as big as barn doors and push almost as much wind on a naked bike as that fairing. With the old Shoei fairing I had on, it actually gave me a higher top end and better MPG than no fairing. It cut the wind really well. It was broken in several pieces.. it and guardrails don't play well together. I have a guy that has been SLLLLLOOOOOWWWWLLLLY putting it back together, but he has a new kid with another on the way and hasn't had a lot of time to work on it. They are apparently like hens teeth though. I tried calling Shoei and asking for some parts (A new turn signal) and got a kid saying, "We don't make fairings, we just make helmets.." Finally talked to one of the old hands in the back shop and was told they haven't made fairings in over 20 years. I found where I can buy a new OEM one, but they're @ $450 and they only had a white and some other color, so I'd have to get it painted on top of that cost. This is a pic of it on the bike when I actually would clean and polish the bike occasionally. lol.

Interesting.............frontal/side section looks almost like the Vetter made Yammy fairing on my Venturer with same signal/clearance lites recessed locations and underside curve....BTW, nice lookin' 'J' havin the Special exhaust on it. Looks good.

[T99Ford]

Power curve starts dropping earlier than that. It fallas off pretty good after @ 7500. I like to keep it in the 6k to @ 7300, but it actually peaks on a dyno in stock form just under 7k.

With a 2-1 and tuned, the power band can be much higher in the rev range, though. At least my G with the yoshi pipe and pods was--peak power closer to 8K on the dyno--with the corresponding flat spot at 3-4K.




I fixed my wheelie problem...since its got more power and torque than an XS 1100, and the engine turns the right way, I put on wheelie pipes!



Seriously does have more power and torque than the 11, just weights almost twice what my G did!!