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Getting a banshee...


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Hello every1 jus wanted to say whats up. I should be getting a banshee this weekend and I believe its a 04 limited edition black on black.. Now my first question is what is a good go fast mod I should get to start me off?? Im new to the sport atv scene but I have been riding trailing 4wheeler/dirt-bikes most of my life. I jus decided I want something fast so I could whoop up on some local 125's that think they are the shit. :cheers:

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welcome! i suggest u get the filter first, always the best since the stock filter is crap. since you said u trail, get some fmf fattys, good all around pipe, especially for trails. they have a nice kit on alba for about $480, with the acception of a air filter adapter that u will need for $ 45, making is $525. http://alba.buyol.com/Item/banpk.htm and http://alba.buyol.com/Item/PD201RC.htm . the powercore2 is a real good silencer, the cheapest and most badass sounding one for the fattys.

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alrite thanx guys... and 1 other question I need to ask. What is a boost bottle?? I tried the search but found nothing that described about it... thanx in advance. :dance:

dont bother with the boost bottle, your stock tube does just fine equalizing the pressure in both carbs. its a waste of cash that you can be spending on the air filter setup. some people says it works and some people say they actually lose performance. I dont think it would be worth it to try.

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alrite thanx guys... and 1 other question I need to ask. What is a boost bottle?? I tried the search but found nothing that described about it... thanx in advance.  :dance:

a gimmick. they're supposed to help equalize the carbs and "store a fresh charge of air/fuel" for the cylinders, but they are pretty much a gimmick. don't get one, and don't buy a "power-up kit" from the big retailers. the retailers will package a set of pipes, a boost bottle, and a jet kit and charge you more for it and the only thing that's worth paying for is the pipes.

 

i have seen some builders or whatever the f*&k they called themselves go into detail about how if they built one with the right angles or something, the sonic wave would pull something, given some engineering behind it with the proper stuff, maybe they help something, but the $30 jobbies, nope. Just don't worry, you don't need one, spend your money elsewhere.

 

First mods in this order.

 

1. Filter box plate (Pro Flow, or the deal from Noss Machine listed above)

2. Pipes and be sure to match them to your ride style (do a search on the different kinds, there's lots of info there)

3. Tires (power is no good if it won't hook up)

4. Compression (buy a head from Noss Machine or let boonman mill yours for you cheap)

 

Let us know when you get here.

Edited by sredish
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i have seen some builders or whatever the f*&k they called themselves go into detail about how if they built one with the right angles or something, the sonic wave would pull something, given some engineering behind it with the proper stuff, maybe they help something, but the $30 jobbies, nope.

read this its interesting, pertaining to that sonic wave stuff. taken from www.toomey.com FAQ page.

 

There is a "rich spot" between 4000 and 5000 rpm on the Banshee..... While it is true that it IS rich, the REASON it is rich needs more explaining.

 

The is an anomaly in the intake tract of the Banshee. What we think we have discovered is, because there is a sonic wave at work in any confined space, (like the exhaust pipe or intake tubes) this wave must be timed to help you with that which you are trying to accomplish, as with the exhaust pipe. There will be some rpm range where the wave will be most out of phase, and an area where it will be most in phase, hopefully we can arrange the in-phase part while the pipe is having its in-phase part....! That is why you feel the big burst of power when the pipe kicks in, because these waves are working in harmony.

 

On the Banshee the most out-of-phase area is right before it synchronizes with the pipe.... so 4000 to 5000 rpm, then at 6000 it starts harmonizing it's pumping action and you feel the pull in the handlebars!

 

What is happening actually is that this wave is being reflected back and forth inside the intake tube (tract) regardless of the fact that the air is only moving in one direction, the wave, which has little if any mass, can travel in both directions and does... Each time it does, it passes the needle jet and when it does, it pulls fuel. When this happens there might be a piston stroke with several helpings of fuel instead of just one, therefore it is rich.

 

The intake tract is too short, and this is one reason why it is a bad idea to put the little K&N filters on the back of each carb, effectively shortening the intake tract even more.

 

It is also a GOOD reason to use our 2:1 filter system because we add about 3 or more inches to the length of the intake tract, helping to lengthen the time it takes for this wave to propagate from one end to the other, and to keep the resultant mixture confined so it may be used and not spit back into a filter....

 

Because this is an RPM specific phenomena, it cannot be "jetted out" because conditions change in response to RPM, not throttle position. If it was at a particular throttle setting, then we could easily say, that at this setting, certain circuits are active and make adjustments accordingly, but it is not. Raise the rpm a little and it goes away. This is one of the reasons Yamaha chose to put the "cross-over" tube between the intake manifolds. This makes one intake tube think it is larger than it really is (as far as sound propagation goes) therefore lowering the frequency of the sound wave, dampening the effects. You can try this experiment yourself, just remove the crossover tube and be sure to plug up the holes in the intake manifolds from which the tube came, then ride it. You will see the difference!

 

This is also where the "Boost Bottle" argument comes in....

 

Yes, there must be the cross-over tube, but the engine couldn't care less how big it is.... this tube is used to communicate the volume information from side to side, not to magically "store-and-forward" mixture for later use, as some have alleged. Nor is it able (as far as we can detect) to allow mixture to be drawn from both carbs at once..... So the "Boost Bottle" as a performance product is a complete placebo and only serves the manufacturer's pocket, not the customer's needs. Beware of companies who sell this kind of thing, they are not being true.

 

Remember, if it sounds too good to be true, it probably is....

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that thing about having to short of an intake tract is probably true. if there was a way to push the carbs farther back from the reeds using tubing or something and just run pods with no airbox i think it would make a difference. mainly the longer intake will speed up the airflow in the carbs. im basing this off of cars where the drag motors have high rise intakes. thats too speed up air fow. but i dont know maybe its diff on a 2 stroke.

Edited by therail
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