Hi,Im thinking of venting my air box. I have a pro flow kit with outwears. Whats the best way to do it. i do go in mud and water quite a bit.thanks

 

If you go through mud and water i wouldnt recommend them. Water can get into the vents and into your air filter and then screw up your whole engine.

 

I've got a 95 wolverine and I vented my airbox lid after I installed my FMF pipe . It made a big difference in throttle response. I don't have any trouble in mud or water I just have to be a little more careful though. And if I do get a little mud or water in the airbox it just goes to the bottom where I can clean it out later. What I did is to draw a graph an top of the lid with a pencil to plot where to drill the holes. The lines were 3/4 of an inch apart both ways. then I drilled a 1/2 inch hole at every other intersecting line until I had it all drilled . I think I have 18 holes now. Then what i did so water and mud can't fall on my filter is to make a baffle out of a piece of tin about 8 inches wide and the length of my filterI then bent the tin in an arc so it would curve down around the filter on both sides leaving about a half inch gap between it and the filter. Then I riveted the baffle to my airbox lib using a long 3/16 rivet at each end of it . When the lid is put on, the tin baffle curves down around both sides of the filter. It may sound hard but it really isnt . After I vented it I had to go up one more size in my main jet .But she really breathes now!!!

 

I put ten of them on my Banshee airbox last year and they worked great! They require re-jetting however!

 

Or you can do what I did which was to order a Moto Force vented lid from Jas Lucky in clear plastic so you can see the condition of your filter at a glance. The elongated vents are placed at the side of the lid to some what deflect water away from the filter. This lid allows 90% of the air flow of an open air box, according to the tech at Jas Lucky. As the others have pointed out, whenever one increases/decreases the air/fuel mix, rejetting is required.

 

How, do you know if you need to change jet sizes? Ive been running mine without the airboxlid and it runs fine.Thanks for your replies everyone!

Stu

 

I was also thinking of drilling some holes and on the otherside putting gortex or neopreme under the hole, do you think this would work?

 

UNI Filters has filtered air vents on the market. They come in packages of six. Drill one inch holes in your air box lid and snap the air vents in place. The foam filter elements can be removed so they can be cleaned and re-oiled. '00 Wolverine

 

In your initial post you didn't say whether you're using the Proflow filter or just the adapter with another brand of filter with the Outerwears. If you are using both pro Flow foam filters along with the Outerwears, then you are pretty much cancelling out any increase in air flow to the carb. In any case, there are two tnings you should do to determine if your jetting is correct. Firstfind a place where you can run the quad for 1/2 mile or longer at 3/4 to full rpms (it doesn't have to be in top gear, just 3/4 throttle in a lower gear). If you find that the engine is cutting out or missing, you're likely running lean & need to rejet to a fatter main jet.
Second, immediatelyafter the test run, without any low speed or idling, pull the plug & read it. An electrode that is grey or even white tells you you are very lean. A chocolate brown or light tan indicates proper main jetting.
My guess is that, unless you're running both of the two filters that Pro Design supplies with their complete system, which you needn't do in your part of the country, then you will need to go one size up on your main.
If you need any further you can email me at the address in my sig.