Air intake filter ...will this work?

[couch]

Took the stock filter and glued some prefilter over it. Not the prettiest glue job but seemed to bond well...Plan on adding prefilter to air horns too ...
Used a piece of hdpe to make an engine jacket .. needs to be trimmed a bit more

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[kanedog]

Nice work!

 

[dooman92]

Looks good. Yeah, prefilter over air horns and , as much as possible, anywhere snow can get in the air box.

 

[couch]

Heated bars are next on the list then hopefully some snow.

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[L.Hughes]

I like your engine jacket, nice job! My YZ required some fiddling with radiator covers depending on snow and temps (one in/one out, slide up/down.) Maybe yours will run more consistent temps, but you may need to make them adjustable?? How was the HDPE to deal with? What did you use for glue on the pre-filter?

 

[couch]

Used cardboard for initial template then transfered rough pattern to hdpe. Would have preferred a slightly thinner sheet stock to work with but otherwise not too hard. Have to add a bit of heat foil by the pipe.

Just used a medium duty hot glue stck and gun for the prefilter. Lay down a short bead and the work the filter into it the move along. Nice thing woth the glue is that you can reheat if you need to adjust. Tried contact cement first but it didnt bond as well to the pvc. Glue gun was definitely easier and better.

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[couch]

Also plan on adding a louver in front of the rad so I can allow for more air flow if needed.

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[wwillf01]

Also make sure when you out the bike up after deep rides no matter how well you deal it and whip snow down or ice sits on that filter then melts and goes straight into the throttle body... just a fyi. Again this is Utah snow for us so it is super fine and makes it through anything.

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[needpowder]

Our most consistent set ups on the Yamaha have actually been the simplest. We have not tried the CR racing intake however. The best for my group in Utah has been stock dry foam filter with a pre-filter around it. Block off the horns with foam and stuff foam around the foam filter so snow can’t come up from below. Like said above, brush off filter at the end of the day or pop off foam and dry out somewhere warm.

 

[couch]

Our most consistent set ups on the Yamaha have actually been the simplest. We have not tried the CR racing intake however. The best for my group in Utah has been stock dry foam filter with a pre-filter around it. Block off the horns with foam and stuff foam around the foam filter so snow can’t come up from below. Like said above, brush off filter at the end of the day or pop off foam and dry out somewhere warm.

So doesn't the stock foam tend to hold on to more moisture? Thought about putting the filter over the foam but decided that it would likely be better underneath. Could also put a lay over the top too as a wnd layer of protection.

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[needpowder]

The pre-filter keeps a lot of the moisture out. We run it over the foam. Our snow is usually pretty dry and fluffy. Not a lot of moisture in it. Heat from the engine definitely melts snow on top of the pre-filter though and allows water onto the filter. If you are not running anything over that cage then it seems like water will just run right down in the intake. The pre-filter helps, but it is definitely not completely waterproof.

 

[couch]

Thanks. I can still use the foam plus I installed prefilter on the front of tbe horns as well as the backside where it dumps into the airbox. Hopefully that should keep most of it out.

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[needpowder]

Lots of snow comes up from the bottom also. Mostly closest to the rider. Just stuffing some kind of foam in there helps a lot

 

[Timberview01]

I also use the dry filter with pre-filter fabric over it. Yes, there will be moisture after a ride, but I've gotten in the habit of pulling the filter out and allowing it to dry. Generally, I open everything up and heat up my shop to about 80 for a few hours to dry everything out. Has worked for me the last three seasons.

Oh, and about the time you think you have plugged every opening that snow may get in, keep going. Stuff some closed cell foam in every orifice.

 

[wwillf01]

Do you think the k and n would work better moisture wise


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