Powerband?

[Mr. Peanut]

It'll take WOT from 2000?

I thought I stalled it on a hill once, the bloody thing tractor'd/chugged up the hill and regained its composure

Just as well I've rebuilt the engine huh?

[Coyote]

now put the bike in 1st and accelerate until you feel the need to change to 2nd. Now do not change gear and open the throttle fully holding it there.

I don't get that. I thought you change gear when you reach redline

[McJim]

I don't get that. I thought you change gear when you reach redline

You're absolutely correct.

[Jantar]

It would appear you're taking advantage of a newbie with all of these silly comments.

Your 'Powerband' is the rate of revs where your horsepower is greatest. Generally within 10% of redline..

Sorry, but I do believe you need to go back to some basic physics. The powerband is often a seat of the pants feeling of the point where you get maximum accelleration to the point where the accelleration dies off. However:
Power = Force x Velocity, and Force is what gives you accelleration.
Force, measured at the rear wheel is a simple function of Torque and gearing, so Force and hence accelleration wull be greatest when Torque is greatest.

The Powerband is therefore from peak Torque to Peak Power. On some bikes this is only 10% of the Rev range, on some its 50%, and on some the torque comes in so smoothly that the powert band is almost the entire rev range. My old GS1200SS is an example of peak torque at only 4000 rpm and peak power at 9500 rpm, now that is one wide power band.

[Mr. Peanut]

Here is an article which rates the NSR the best bike in the world. I hate to agree, but its pretty conclusive.

http://www.simjen.com/request.php?1

[Mr. Peanut]

Sorry, but I do believe you need to go back to some basic physics. The powerband is often a seat of the pants feeling of the point where you get maximum accelleration to the point where the accelleration dies off. However:
Power = Force x Velocity, and Force is what gives you accelleration.
Force, measured at the rear wheel is a simple function of Torque and gearing, so Force and hence accelleration wull be greatest when Torque is greatest.

The Powerband is therefore from peak Torque to Peak Power. On some bikes this is only 10% of the Rev range, on some its 50%, and on some the torque comes in so smoothly that the powert band is almost the entire rev range. My old GS1200SS is an example of peak torque at only 4000 rpm and peak power at 9500 rpm, now that is one wide power band.

Don't forget to differentiate between engine torque and wheel torque.

If wheel torque in first gear still exceeds that of second at the redline, it would be faster to shift at that point, rather than at the power peak. And so on for the remaining gears.

Not that you said anything at odds with that, I just thought was an important point.

[Edbear]

I wonder what I've started...

LOL!!! I bet you knew exactly what you were starting...

[Jantar]

Don't forget to differentiate between engine torque and wheel torque.

Exactly. That is why I said Force, measured at the rear wheel is a simple function of Torque and gearing. It is the force that the tyre exerts on the pavement that pushes the bike forwards. That is also why manufacturers usually chose gear ratios that will allow you to change up at max power output and still stay above peak torque revs.

[Quartermile]

Hey
yea thanks that helps alot...... I guess
I can handle the insults .......I hope....

[Smokin]

Hey
yea thanks that helps alot...... I guess
I can handle the insults .......I hope....

You will be just fine mate.

Your skin will thicken up over time.

[jade]

2 stroke 250 powerbands are my favourite..

[Mr. Peanut]

Haha I remember that bike. Why the trip to the dark side? Should have modded the NSR

[Moxy]

I actually had a dream about about "upgrading my powerband on my bike" my "engine" was a two piece thing - a bit like a big Mr. Potato head, and inside there was a label reading "power band" with a big black rubber band wrapped around two extrusions. Once I replaced it my bike was running faster than ever.

[race me!!!!]

im quite suprised this thread has stayed on relativly on track for three pages and not hijacked!!!
fuck what are we coming to

[Sketchy_Racer]

You're absolutely correct.

errr. No

My KR 150 has its powerband between 7-9 RPM. After you reach 9 RPM it flats off real bad. Even though it red lines a 11.

No point revving all the way to 11 when its stopped accelerating at 9 !!