How does a powerband work?

Question

I have a Yamaha TTR 125 and it has a powerband, i heard it has something to do with the torque but i'm not sure. i was wondering if anyone had a answer

Answer 1

It's the belt that the squirrels run on to make the bike go. The wider the "Power-band", the more squirrels it'll hold.
(Sorry, I couldn't resist)

Answer 2

All engines have a "POWER BAND" . Its not something that can be bolted onto a machine or bought over the counter of a shop. When an engine is running it is producing energy, the energy starts at tick over and goes all the way to the rev limit of the engine. The "power band" is the point within the rev range that gives the most torque or power. Torque is the twisting energy produced at the crank that ultimately turns the back wheel.
Simply put a two stroke has a narrow power band in the rev range IE between say 4000 rpm and 6000 rpm and that will show up as a sudden increase of acceleration.
A four stroke has a slightly broader band say between 3000 and 8000 rpm that means the acceleration starts earlier.
A diesel engines power starts even lower but drops off earlier ie 700 rpm to 2000 rpm.
All the above are very generalized and the tuning industry is massive. A good tuner can get allot of extra power out of any engine the down side is that the engine will be under allot of stress and will need allot more looking after. As a general rule if you have a small engine and want more power its cheaper in the long run to go up to a bigger engine. I hope that the above makes sense but if you can get any books its worth while to read up on it. Have fun.

Answer 3

I agree with the first several posts. I wouldn't say that it isn't a "tangible" thing. It's just not a physical part of the engine, it is a specification, the point, range, or "band" where the engine is producing peak torque or horsepower (the torque power band is the most significant for a rider). When you ride, keeping the rpms around the "power band" rpm range will give you the fastest throttle reaction. If you are way below the power band rpm range, you usually need to downshift to get the rpms up in the power band range to pass someone quickly. Racing bikes are usually set up or driven to be in the power band almost all of the time. That's when you hear the "wha-whaaaaa!!!!!" noise when they go by, they are right up to peak when they sound like that. Or when you see a street bike doing a wheelie, you DON'T get a bike to do that unless they are in the power band.

Answer 4

As F650 said in a longer manner,the power band is not a tangible thing. It is lines on a Dyno read out that indicate where in the range of RPMs a motor makes the most power, it varies from motor to motor and by the way a motor is tuned and accessorized.

Answer 5

I hear this question by a lot of newbies. I believe a lot of folks became confused when power valves were introduced. Power valves basically give the engine a wider power band. I think that confused folks that didn't already understand the terminology.

Answer 6

there is not any literal powerband to change. The powerband is the variety of RPMs the position the bike makes the most means. once you're bike isn't as reliable because it became, first verify the basics like spark plugs, air filter out, etc. Have the compression checked. The carb would favor to be rebuilt.

Answer 7

its where the motor makes th most power...Like 3000 to 6000 rpm. on a bike like yours maximum torque is probly 5000 rpm and horsepower about 7000..so you powerband would be 5000 to 7000 rpm...look up you power numbers

Answer 8

it doesn't "work" it is not a part, it is a measurement use to describe the combined moving components operational parameters

Answer 9

i dont no but they r great i have a rs wit 1