Powerband?

[Quartermile]

Hi

I know what powerband is but how does it work and also what on earth is a compresion ratio as I read motorbike magazines and in the specs of bike they have the compression rato but I have no idea what it is.

[Mr. Peanut]

Definition of a powerband = the location and width of the rpms where the engine is producing peak torque values.

You are thinking of a powervalve perhaps?

http://en.wikipedia.org/wiki/2-strok...r_valve_system

Compression ratio is a measurement of how much the gas in the combustion chamber gets squished. I.e. 5:1 would mean then gas is squished to 1/5 its original volume, 10:1 would mean it's squished to 1/10th the original volume.

Generally speaking, and with all other variables remaining constant, the higher the compression ratio, the more powerful the engine.

http://en.wikipedia.org/wiki/Compression_ratio

[onearmedbandit]

Let wikipedia tell you.

[Smokin]

Compression ratio is a measurement of how much the gas in the combustion chamber gets squished. I.e. 5:1 would mean then gas is squished to 1/5 its original volume, 10:1 would mean it's squished to 1/10th the original volume.

Generally speaking, and with all other variables remaining constant, the higher the compression ratio, the more powerful the engine.

http://en.wikipedia.org/wiki/Compression_ratio

I has always wondered how that worked.
Cheers Mr peanut

[GR81]

Generally speaking, and with all other variables remaining constant, the higher the compression ratio, the more powerful the engine.

and often the shorter the life span lol

[Skunk]

and often the shorter the life span lol

Unless it's built to take it.

[race me!!!!]

i rebuilt my bike the other day and i had to replace my power band now it goes heeps better

[race me!!!!]

bahahahahahahahahahahahahahahahahahahaha
left handed screw driver
bucket of steam...
work as an apprentice its great!!!

[Buster]

Go to your local dealer and ask if they can have a look at your powerband. It could be faulty and might need replacing. Im saving to get a bigger powerband for my bike.

[terbang]

Hah when I was an apprentice I was sent to the parts shop for a long weight..!

[pritch]

i had to replace my power band now it goes heeps better

Are you sure that wasn't the rubber band?

[James Deuce]

I use my powerband to hold my undies up.

[McJim]

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. To demonstrate this find a nice quiet pice of straight road and stop (making sure there are no Police around) 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.

You will feel steadily increasing acceleration until you get to within 10% or so of the bike's redline at which point you will feel as though someone just kicked your bike up the arse and it will shoot forward a bit. You have just found the powerband.

Compression - this is the pressure under which the bike's engine operates - older engines tend to lose compression due to wear and tear on cylinders, piston rings etc. Higher performance engines tend to have higher compression ratios. Ducati Monsters have fairly low compression ratios compared with Cagiva Raptors for example.

[James Deuce]

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

Not taking advantage. Taking the piss.

It's one of those questions that is up there with logging into CNET and asking if your PC will still work with the power turned off.


Google and Wikipedia are your friends.

[McJim]

Not taking advantage. Taking the piss.

It's one of those questions that is up there with logging into CNET and asking if your PC will still work with the power turned off.


Google and Wikipedia are your friends.

I still think your kicking some poor kid when he's down. My philosophy - if you tell someone something and they forget it they are a dumb arse - if they never knew it in the firstplace we should at least tell them so we can call them a dumb arse tomorrow....

What the fuck is CNET? How do I get one fitted to my bike?

cheers