POST YOUR INFO!!!!! I'm interested in seeing with mods/non-mods where you guys are feeling your powerband kick in. If you don't know what a powerband is (or if you think a GS500 doesn't have one) then you obviously haven't been riding your bike correctly. :)
I notice a definite kick-in-the-pants and a huge change in throttle characteristics once I reach mine...
My bike has:
Stock Gearing
V&H Exhaust
Up 1 Jet-size
2 Washers on Needles
Stock Airbox
3 turns out on mix screws
Powerband kicks in @ 7000rpm*
Powerband levels out @ 10,000rpm
Most power below powerband is between 4500rpm and 5500rpm
When stock... powerband was @ 5500rpm, died off around 8000rpm. 8000 to redline was pretty gutless.
*I notice that regardless of gear and speed, if I'm on a flat... as soon as I hit 7k I can crack the throttle and whip it to 10k in a matter of seconds. It's just a completely different bike from there up... it sounds different, it handles different, and it responds differently.
To conclude my thoughts I'm actually bringing my bike to the local Dyno tuner in town... I feel I'm running rich and unloading too soon in the powerband. I'd like to bring it back down to around 6000-6500 and have it die off around 9500 or so... I suppose gearing could change this, but I'd like to see where the motor/timing/mix is at first before doing any gearing changes.
Dan
2007 california model
k&n drop in air filter
2 washers on needles
stock exhaust
stock jets
3 turns out on idle mixture screws
Mine seems to have the most umphf in the 6-9k rpm
My power-band kept snapping and I got fed up replacing it, so I fitted a power-chain instead. Its noisier but I think I have got the tension bang on now and so far seems to be holding up well :thumb:
Quote from: sledge on April 15, 2009, 09:31:37 PM
My power-band kept snapping and I got fed up replacing it, so I fitted a power-chain instead. Its noisier but I think I have got the tension bang on now and so far seems to be holding up well :thumb:
LMAO !
Quote from: Danny500 on April 15, 2009, 08:59:09 PM
(fixed this first part for you)
... powerband was pretty gutless...
(and this part..)
1) To conclude my thoughts I'm actually bringing my bike to the local Dyno tuner in town... 2) I'd like to see where the motor/timing/mix is at first before doing any gearing changes.
Dan
well hi there Dan. Hope your gs doesn't assplode when the yahoo doing the toooning decides to 'redline' your bike in search of more powa. Nothing like over revving an air cooled bike for 20-30 minutes.
if you find a toooooner that actually cycles the bike through the NORMAL rpm range, in every gear, for the purpose of actually seeing what the fuel/air ratio is - let us know. 99% of them just run the bike to death for the purpose of a curve on a graph.
Dynamometers are so incredibly over rated.
**************
My powerband: i dunno, i try to keep it in the fun torquey area of 5000 - 8000 or so. after that i'd be going too fast to be legal. :)
.....and dont forget to add in the cost of a new rear tyre.
http://www.avon-tyres.co.uk/motorcycle/?page=fitment
Danny:
Mine seems to do what yours does. I have usable power at 3500 and it seems to build in linear fashion until the rush comes on at 7000 and continues past 9000. I don't let it go to 10000. It seems to want to be shifted at 9500.
http://gstwins.com/gsboard/index.php?topic=45924.0
Quote from: Danny500 on April 15, 2009, 08:59:09 PM
If you don't know what a powerband is (or if you think a GS500 doesn't have one) then you obviously haven't been riding your bike correctly. :)
Yea... "Power Band" :cookoo: GS Doesnt have one... Its more of a higher RPM torq.. (there is no "power band" bud sorry)
We have a nice joke here at the shop about them... If you are having trouble with your "Power Band" I can sell you a new one.. I think they are $2.99
???
(http://i61.photobucket.com/albums/h55/scottpeel/powerband.jpg)
:icon_twisted:
I was about to say - I keep my power band in the hardware drawer in the kitchen. I don't want to lose it.
I think i get more power out of a fudgie......than a GS
oh, that kind of power..... ride a different bike with >75 HP
Powerband according to Wikipedia...
The power band which refers to the range of operating speeds under which the engine is able to operate efficiently. A typical gasoline automotive engine is capable of operating at a speed of between around 750 and 6000 RPM, but the engine's power band would be more limited. The engine would typically not generate maximum torque until higher operating speeds of perhaps 2500 RPM, after such, the torque drops off. The peak power (horsepower) might be closer to 5000 RPM. Such an engine would be said to have a "power band" of 2500-5000 RPM (another example would be from torque peak to redline: 2500-6000 RPM).
This can be applied to any engine and establishes a reliable quantification of the above notion "the engine is able to operate efficiently".
Misconceptions:
Since the power band is in between the peak torque and peak power, the distance between the peaks can change how a vehicle behaves when it reaches it. A two-stroke's power band is typically very short and will seem to 'jump' when it hits it, whereas a four stroke typically has a greater distance between the peaks therefore giving the impression that it doesn't have one because it isn't 'jumpy' or twitchy coming on and off the powerband. However, a four stroke can be tuned via the valve timing/port spacing to have a narrow power band and it will jump much like a two stroke and vice versa.
--------------------
So there... ALL MOTORS HAVE A POWER-BAND... just depending on your modifications (or if you actually pay attention to how you ride) you SHOULD notice a point during acceleration where the power jumps, or becomes SMOOTHER...
Too bad everything written on Wiki is :bs:
Just kidding Mr. 500...
Nice rebuttal :thumb:
- Bob