VS or not to VS....
Road Master
Joined: Aug 2012
Posts: 1,070
Likes: 74
From: Los Angeles
Road Warrior
Joined: Oct 2012
Posts: 1,372
Likes: 49
From: In the foothills of southwestern NC - US of A
A lot of people get a little too worked up over running a velocity stack.
Bike motors are pretty durable & generally don't get a ton of miles put on them. Also, we are taking about air cooled, push rod V-twins. These motors are easy to rebuild the top end IF you wear it out from too much debris. A $425 RSD air cleaner + tax cost more than a top end rebuild.
Bike motors are pretty durable & generally don't get a ton of miles put on them. Also, we are taking about air cooled, push rod V-twins. These motors are easy to rebuild the top end IF you wear it out from too much debris. A $425 RSD air cleaner + tax cost more than a top end rebuild.
Yep velocity stacks ['nothing but a venturi] look righteous on the bikes that get plastered all over the covers of American Iron and Easyriders magazines [and who wouldn't mind run'n up against some of those skankie chicks either
[sorry ladies], dream on LOL], and they're great for top end performance on a racing/drag bike but that's about it. If however you don't have a show/drag bike and looking cool is more important than preventing engine damage, you have enough money to shell out for unnecessary engine repair, and lastly you have the time to deal with these unnecessary repairs, then have at it. Otherwise stick to proven, reliable and performance improving air filtration technology and stop worrying about "looking" cool. Why? So you can keep riding and enjoying yourself of course 
=8^)
Tourer
Joined: May 2012
Posts: 424
Likes: 4
From: EastCoast
Some people like the low profile look of the VS, not always trying to emulate a true VS which in general, are not "practical" for many riding conditions. The kuryakyn Velociraptor (I think has a filter) would be a nice combo of form and function IMO(if it has a filter of course).
If dead set on a VS, why not try the old pantyhose cover trick? Happy hunting!
If dead set on a VS, why not try the old pantyhose cover trick? Happy hunting!
Road Master
Joined: Feb 2010
Posts: 933
Likes: 7
So by that logic we should lower our bikes to the point of our pipes dragging on the ground during the slightest of turns since they're easy to replace. Who in their right mind would want to, just for the sake of looking cool, run an engine, any engine [other than a pure racing application], without proper air filtration is beyond my comprehension. It's just *******. And to use the excuse to justify using a VS because it's "easy to rebuild" the top of the motor in case of debris induced damage is just ********. Many here don't wrench so in the end it wouldn't be cheaper for them to have their top end rebuilt. Ultimately in the end they'll be out $$ and the use of their bike for the duration of what amounts to an unnecessary and totally preventable need for um, "repair."
Yep velocity stacks ['nothing but a venturi] look righteous on the bikes that get plastered all over the covers of American Iron and Easyriders magazines [and who wouldn't mind run'n up against some of those skankie chicks either [sorry ladies], dream on LOL], and they're great for top end performance on a racing/drag bike but that's about it. If however you don't have a show/drag bike and looking cool is more important than preventing engine damage, you have enough money to shell out for unnecessary engine repair, and lastly you have the time to deal with these unnecessary repairs, then have at it. Otherwise stick to proven, reliable and performance improving air filtration technology and stop worrying about "looking" cool. Why? So you can keep riding and enjoying yourself of course...
Yep velocity stacks ['nothing but a venturi] look righteous on the bikes that get plastered all over the covers of American Iron and Easyriders magazines [and who wouldn't mind run'n up against some of those skankie chicks either [sorry ladies], dream on LOL], and they're great for top end performance on a racing/drag bike but that's about it. If however you don't have a show/drag bike and looking cool is more important than preventing engine damage, you have enough money to shell out for unnecessary engine repair, and lastly you have the time to deal with these unnecessary repairs, then have at it. Otherwise stick to proven, reliable and performance improving air filtration technology and stop worrying about "looking" cool. Why? So you can keep riding and enjoying yourself of course...
So by your logic we should sell our Sportsters and get Suzuki Burgmans. Who needs to look cool when functionality and reliability are key to rational, reasonable motorcycling.
Point is, these bikes are cheap/easy to work on. Plenty people on here work on their own bikes. Most likely nothing will happen by running a stack, most bikes on this forum wont get to 20k miles, not that they break down, most just dont use them that much. Running a stack isnt that big of deal.
Also, plenty of guys lower their bikes and let pipes drag, it's not a big deal either. Maybe you can give us your reason why dragging pipes is stupid and bull$hit. Let me start you out, Yep dragging pipes ['nothing but set of zoomies] look righteous on the bikes that get plastered all
BTW, Nope, a velocity stack isnt a venturi.
Road Warrior
Joined: Oct 2012
Posts: 1,372
Likes: 49
From: In the foothills of southwestern NC - US of A
Thanks so much for your astute assessment of the dis-advantages of a velocity stack or as you say, "'nothing but a venturi".
So by your logic we should sell our Sportsters and get Suzuki Burgmans. Who needs to look cool when functionality and reliability are key to rational, reasonable motorcycling.
Point is, these bikes are cheap/easy to work on. Plenty people on here work on their own bikes. Most likely nothing will happen by running a stack, most bikes on this forum wont get to 20k miles, not that they break down, most just dont use them that much. Running a stack isnt that big of deal.
Also, plenty of guys lower their bikes and let pipes drag, it's not a big deal either. Maybe you can give us your reason why dragging pipes is stupid and bull$hit. Let me start you out, Yep dragging pipes ['nothing but set of zoomies] look righteous on the bikes that get plastered all
BTW, Nope, a velocity stack isnt a venturi.
So by your logic we should sell our Sportsters and get Suzuki Burgmans. Who needs to look cool when functionality and reliability are key to rational, reasonable motorcycling.
Point is, these bikes are cheap/easy to work on. Plenty people on here work on their own bikes. Most likely nothing will happen by running a stack, most bikes on this forum wont get to 20k miles, not that they break down, most just dont use them that much. Running a stack isnt that big of deal.
Also, plenty of guys lower their bikes and let pipes drag, it's not a big deal either. Maybe you can give us your reason why dragging pipes is stupid and bull$hit. Let me start you out, Yep dragging pipes ['nothing but set of zoomies] look righteous on the bikes that get plastered all
BTW, Nope, a velocity stack isnt a venturi.
And yes, a velocity stack is indeed a venturi - when a [larger] diameter of a tube is reduced to a smaller diameter and liquid or air is introduced through it there is a resulting increase in pressure at the smaller diameter tube. Sure, it was originally designed for use with liquids but the principle is the same with air and gases. See the example below in regards to AIR.
You may now go back to rebuilding your top end, LOL
=8^)
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Road Master
Joined: Feb 2010
Posts: 933
Likes: 7
if VS's were the **** everybody would be running them and since they're not on everybody's bike they ain't the **** now are they, for the very reasons I mentioned. And I am not aware of one single MC owner who knowingly and happily drags and grinds his or her $300+ pipes or slip-ons...and for what? Is it cool to do so? More like pretty stupid if you asked me.
And yes, a velocity stack is indeed a venturi - when a [larger] diameter of a tube is reduced to a smaller diameter and liquid or air is introduced through it there is a resulting increase in pressure at the smaller diameter tube. Sure, it was originally designed for use with liquids but the principle is the same with air and gases. See the example below in regards to AIR.
And yes, a velocity stack is indeed a venturi - when a [larger] diameter of a tube is reduced to a smaller diameter and liquid or air is introduced through it there is a resulting increase in pressure at the smaller diameter tube. Sure, it was originally designed for use with liquids but the principle is the same with air and gases. See the example below in regards to AIR.
Second, every real performance bike out there today has a velocity stack design on top of their throttle bodies inside the filtered air box. So they are a big deal and they are used. Plenty of people use them unfiltered as well and I dont see your big point.
Third, upstream of the velocity stack you need to have a constant flow of a tube or pipe which is then being reduced for a venturi effect. But you dont, the velocity stack isnt part of a tube, it is simply there to smooth out the air into the throttle body.
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