All vehicles with engines have a powerband.

As for your experience, I guess I've never quite wrung mine out to redline.

 

i definitely didnt hit the redline intentionally...i cringed when i saw it jump just beyond the red and shifted immediately!

 

depends what color of a powerband your running. I hear the purple powerbands really take off on top, red is for low end.

 

All vehicles with engines have a powerband.

As for your experience, I guess I've never quite wrung mine out to redline.

+1

I've come close... but no red area for me.

 

Mine is in the red quite a bit of the time for short bursts when off road. It pulls hard above 7K and comes on real strong again at 10K and on into the red until I get valve flutter ( I think) around 12K where there is no power at all. Mind you these bursts are only for a few seconds and yes, I know it's not good for it. I made it to have fun on and thats what I do with it. When the engine lets go I'll buy another one.

 

I have never had mine past about 8k, and even then only when I accidentally rev it with the clutch in or something. Then again, I am constantly paranoid I will mess my bike up.

 

depends what color of a powerband your running. I hear the purple powerbands really take off on top, red is for low end.

oh man the purple ones are where its at!!!

 

I have never had mine past about 8k, and even then only when I accidentally rev it with the clutch in or something. Then again, I am constantly paranoid I will mess my bike up.

read this and stop being paranoid

 

That's a sweet article. Thanks for posting it.

 

I sort of forgot about this post and was trying to figure out what the lady in the450man's avatar is falling into...

 

that article is awesome. and for the answer to this thread, the 500s ive seen all have a very noticeable powerband, the pink one to be exact.. but forreal, i know my bike as well as others have no balls under 4000rpm, it kicks in a bit then, and then you keep revving to 7000rpm it takes off like a rocket.. so it runs like a 2 stroke, a lot of it is just top end power.

 

You may need to adjust your clutch cable or worse, get a new clutch if in the high gears it is instantly jumping to redline.
What you are experiencing isn't the "powerband" it is something else.

 

I don't understand, everyone says it runs like a bag of nails under 4000rpm. Mine runs fine until you go below 3000rpm. It has smooth torque from about 3000rpm onwards, good midrange 4500-7000rpm (after the FOGmod) and then goes like the dogs bollocks at 7000rpm until 9500rpm when I change gear.

 

Ok everyone stop teasing the newb! A powerband is not a physical thing, although I admit I like purple, too. Ok, Ok, let's see if I can define it: it's the power the engine makes at certain rpms. Some sport bikes, like inline 4s and even the 500 have very little in the lower and middle rpms, and a lot more in the upper part of the rpm range. 2 strokes take that to an extreme. Other engines like the inline 3 in my Triumph and many V twins make more power in the lower and middle rpm ranges but may fall off more on the top end. That's a generalization and there are exceptions. A diesel tractor is desirable because it makes a very flat powerband and therefore can do a lot of work at very little rpms. That's one reason it gets better fuel economy. My diesel tractor is at full working rpms at only 2200 and can run a 540 PTO there. My gas tractor needs to be at about twice that many rpms.

 

jesus roxy! ride bikes and work tractors??! if you werent so young i would hit on you lolol jks!

 

jesus roxy! ride bikes and work tractors??! if you werent so young i would hit on you lolol jks!

I have a nice pickup truck, too!

 

there are also 2 methods to every bike break-in period too. nice and easy, or completely pinned. i gave my engine hell on my cbr when i broke it in. was told it seats the piston rings better. made sense so i went for it. i didnt have any problems whats-so-ever.

i also found myself bouncing off the rev-limiter at stoplights too cuz " i liked the sound it made." so give it hell buddy.

 

 

I used to notice a significant boost in power above 6500 RPM, but there's no need to ever rev the EX past 10,000. it makes peak power at 9800, so to rev beyond that is actually getting you LESS power.

sounds like the OP's bike is either losing timing (the EX doesn't have a rev limiter), or like Tulok said, his clutch is suddenly letting go under max load.

 

the reason to rev any engine over the red line is to get you closer to the power band after you shift.

if you know that shifting into 5th will put your rpms below the power band with normal shifting, you might want to red line 4th gear so you will be shifting into the power band instead of just under it.

not sure if im explaining this correctly

 

EH , What ?.

 

its about keeping your rpms high. not everyone understands the importance of that. maybe a track rider could explain it to you.

 

I don't understand, everyone says it runs like a bag of nails under 4000rpm. Mine runs fine until you go below 3000rpm. It has smooth torque from about 3000rpm onwards, good midrange 4500-7000rpm (after the FOGmod) and then goes like the dogs bollocks at 7000rpm until 9500rpm when I change gear.

I find it depends entirely on the gear you are in. 1st will pull at any RPM above idle. 2nd is ok down to 2.5K. 3rd prefers at least 3,000. 4th and 5th are unhappy when less than 3,500. 6th needs 4K or more.

Lower gear == more torque == less RPM required.

 

If you don't already know this, a powerband is not an actual object.
It refers to the rpm range where an engine makes it's most power. This may or may not be a "useable" range, like in the case of the R6 (dyno below), unfortunately the US is a numbers game so peak horsepower is marketed more than anything else.

If you are riding an R6 at 3,000 rpms, you will be bogging it.
You then go Wide open throttle (WOT) the revs will climb slowly until you reach 5-6,000 and the bike will start to pull harder. as the revs climb, approaching the powerband the bike will continue to accelerate harder and harder and when you reach the very high RPMs it will pull very quickly into the over-rev range. It is still making a lot of horsepower, but at this point (15,500 rpms) the bike definitely stopped accelerating as hard and it's time to change gears.
If then engine is spinning between 10-14k it is going to be very responsive, have the most overall horsepower and accelerate the hardest.
Hopefully this clears things up a little bit

 

just so everyone knows I'm aware that there is not a physical object called a powerband...and I never implied that I thought so. I know what the powerband is, i never asked what it is, I was just asking to see if anyone else had experienced similar effects in your ex500.