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hole in airbox? y/n?


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So I'm hearing a lot of ppl talk about some of the mods they have done to their quads and I'm hearing a lot of ppl drilling a hole in the airbox. Obviously for more air flow, but is it actually worth it? I ride alot in mud and sand. Is there a noticeable difference? And are you drilling the hole/s in the side? Or top? Thanks for the info yall.-Red

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Another option is to take the airbox lid off if your not riding in wet conditions. That way you aren't doing any mods that aren't reversable. You can also get a airbox lid/filter combo which will drastically increase your airflow, but also keep out water and mud. Rocky Mountain ATV sells the Pro-Tech lid for around 90$.

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I don't know how it works for other ATVs, but I tried the Pro-tec lid for my LT-R, and it was junk. K&N makes a true filter lid, it is called a power lid, it is much better than the Pro-tec lid. I personally run a stock lid with the top cut out and a piece of Outerwears material set in place with Permatex RTV Red. It works fairly well to keep mud and water out, but some water does get through when I get really wet, I find myself avoiding puddles as much as I can most of the time. You pull the stock lid off and put it back on when you want more protection from the water and such, but you have to re-jet every time you remove or put back the lid. Here is a pic of what I did to my lid. Remember, if you do modify the intake in any way to get more air, you need more fuel too, so you will need to re-jet your carb.

CIMG0002-1.jpg

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If Mud and Sand is involved then I would say no.

But if you do decide to drill make sure it is on the pre filtered side. If the quad is not EFI and you have an aftermarket exhaust you will have to rejet or risk running lean. For some EFI setups you may need to re-map the controller. I am working on something for additional air flow but the intake would not be as low as the airbox.

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I don't know how it works for other ATVs, but I tried the Pro-tec lid for my LT-R, and it was junk. K&N makes a true filter lid, it is called a power lid, it is much better than the Pro-tec lid. I personally run a stock lid with the top cut out and a piece of Outerwears material set in place with Permatex RTV Red. It works fairly well to keep mud and water out, but some water does get through when I get really wet, I find myself avoiding puddles as much as I can most of the time. You pull the stock lid off and put it back on when you want more protection from the water and such, but you have to re-jet every time you remove or put back the lid. Here is a pic of what I did to my lid. Remember, if you do modify the intake in any way to get more air, you need more fuel too, so you will need to re-jet your carb.

CIMG0002-1.jpg

What were the problems with the pro tech lid? I'm looking to get an airbox lid for my raptor this summer, but need some feedback as to what everyone uses and what they think of them. More opinions from everyone would be appreciated.

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What were the problems with the pro tech lid? I'm looking to get an airbox lid for my raptor this summer, but need some feedback as to what everyone uses and what they think of them. More opinions from everyone would be appreciated.

It didn't seal to the air box. It literally just sits on top of the box, I got 2 small zip ties to hold it down. I thought I would fix the sealing problem myself by running some silicone around the edges where the lid contacts the top of the box, and using srews to hold the lid down tight. This worked to create a seal, but the filter material on the lid just got sucked out of the lid and into the airbox from the vaccum. I peeled the silcone off and sent that P.O.S. back to Rocky Mountain. I got no problems getting my refund, they have great customer service, I don't have anything bad to say about RM, just that Pro-Tec lid that I got from them. Worst $90 I have ever spent.

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  • 2 months later...
  • 3 weeks later...

depends on the quad my KFX700 alot of people do what they call a 12 hole mod were you drill 12 1" inch holes around the edges of the the airbox lid. were as my 450 likes no air box at all. it mainly depends on your riding applications and what people have found works best for the specific quad.

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  • 5 months later...

here is what i usually do on a new atv that i buy .. i get on ebay and find a used air box lid ... then when i get it i drill 3/4 inch holes in it and get some little filter plugs at menards or another home care center ... you can just leave the holes open also ... that way you still have the original equipment lid and an extra that has the mod ...

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