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Discussion Starter · #1 ·
I don't know if you guys have seen this or not but I thought I would post it because I think its a cool product. Rocky Mountain ATV is selling a UM Racing aluminum air box that replaces the stock airbox on the Predator. I know, you're saying, "but if it just replaces the existing box what's the big deal." The big deal is that the new box uses the clamp on K&N filter that fits the Honda 250R. What this means is that you can put this product on and get the same air flow as the direct clampon filter that everyone is using now, and you get the added protection of an aluminum air box.

Go here to see a picture of it: Aluminum airbox
 

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Nice looking piece. I will probably order it just so I can get rid of the crappy plastic lid. No matter what I've tried I haven't been able to keep the seat from rubbing on it. My only concern is jetting it.
 

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where did you guys see a picture at, all i saw was ex, banshee, raptor. i would like to see a picture of it before i decide on it
 

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Go to umracing.com
 

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I orderd one the other day, I should have it monday. It uses the same clamp-on filter as the 250R. For some reason polaris made the stock airbox with a 2 inch air inlet and the stock carb has a 3 inch inlet, makes no sense. This airbox should definetely wake the predator right up, without the problems that some experianced with the clamp-on directly to the carb.
 

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so this air box connects directly to the carb. Does it come with everything as far as the clamps and filter.
 

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Discussion Starter · #9 ·
not directly to the carb. it fits where the existing airbox is now. it will connect to the piece that comnes off of the carb. that runs to the airbox.
 

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ohh that sucks
 

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RNGMSTR
I really can't afford that kind of money right now, but I can make it w/ little trouble. I was wondering if you could get some quick measurements off of that thing before you put it in.
 

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I can do that, I don't have the thing yet, it should be here, but I only pick my mail up every few days. As soon as I go pick it up, I will measure it and post it, what measurements do you need?
 

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Mostly Harmless
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$259!!!!! They sure are proud of that thing. Plus, metal makes a great heat sink, so the air you get will be nice and warm.

I thought about adding a veloticy stack to the regular clamp-on filter except the local Honda dealer wants $100 for one... too much for an experiment.

Rob
 

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Discussion Starter · #14 ·
Someone explain to me what a Velocity Stack does? I just looked it up on the net and I have some idea of what it does but I am not sure. Can someone enlighten me.
 

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Mostly Harmless
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It "straightens out" the air going into the motor. It's basically a stack of small, thin airfoils that smooth out airflow and reduce or eliminate turbulance.

Rob
 

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Discussion Starter · #16 ·
That's what I thought it did. I have only seen these on high performance carbs and those carbs were usually attached high performance drag racers. I seem to recall seeing a different product a few months back that would do the same thing but it was designed for regular carbs. it was basically a mesh screen type material that was thick. you placed it inside the intake of the carb The turbulent air would pass through the screen so that it was a steday flow when it hits the mixture. i have been searching around the net to try to find this again but i have had no luck. if i find it again, i will post it.
 

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$259??? rocky mountain will ship one to you for less than $200. take a look at just about any full race quad, they pretty much all run aluminum airboxes, so I highly doubt there is any heat issues.
 

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Mainly the area around that pyramid on top, but the overall dimensions would save some time.
 

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I think it's a waste of your money, pretty lame. I know alot better ideas on how to get more air or is it velocity, HHMMM LOL LOLRO later
 
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