How to make your own air box lid pre-filter (step by step)

**07ltz400** · 03-28-2010, 11:21 PM

anyone running one of these on a ltz400. im really intrested in doing this. looks simple and seems to have very nice end results. i'll just wait until my pipe and jet kit come in before i begin my work

**ballerchaos** · 05-15-2010, 12:10 PM

wow looks awsome, i am going to have to try this on my 400ex once i save up the money to buy my exhuast so i only have to jet and tune the carb once. Looks easy, and a nice piece ove diamond plate and some stainless steel hardware, will make it sweet. Just a question, are you useing a gasket of any type.

**ballerchaos** · 05-15-2010, 01:15 PM

also, what about cutting out other areas of the airbox and doing this same idea? i was looking at mine and the left side looks like it has a flat decent size surface, you think there would be to much air or any issues if i attempted ot do this??

**08Outlaw** · 05-17-2010, 06:33 AM

I did not use any gasket, just a little RTV sealant between both the pre-filter and box surface and bracket and pre-filter. As far as other mounting surfaces, I would just make sure that it's in a location least likely to get alot of water. Since the Outlaw already had a small intake opening on top of the box, that is naturally the best place for the cutout

**ballerchaos** · 05-17-2010, 07:59 PM

i got yah, i already bought the diamond plate to make the mod, waiting to save up the money for my exhuast, so i only have to tune my baby once. ill post pics ASAP

**Thumpin440ex** · 05-17-2010, 08:30 PM

I just ordered the k&N cover fri, am going to be doing this. I will post pics up when I am finished.. Def better then buying there kit for 50+ buks, well if you can do it yourself... Nice write up

John

**j0sh** · 01-05-2011, 10:43 AM

Thanks for this! I have a buddy at a body shop that is cutting me a flat piece of plastic from a bumper. I will cut it to fit and either bolt it or rivet it on.

**j0sh** · 01-06-2011, 04:48 PM

quick shot of mine. just finished

**08Outlaw** · 01-07-2011, 06:04 AM

Nice job, Josh- looks great

**j0sh** · 01-07-2011, 06:48 AM

could have been a little better, but I'm happy. The filter opening was a little different shape than the template. That's why the inside looks like the cut is off.

Thread: How to make your own air box lid pre-filter (step by step)

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