| Author | Message | ||
     Moosestang |
When I first removed the filter at 100 miles, I noticed some dirt had gotten past the filter. Now that i'm over 1600 miles I went to install a k&n and found quite a bit of dirt. I live on a dirt road (sand), so sand gets thrown up by the front wheel. I put some thick grease around the seal and installed the k&n. Other than stuffing some foam in the intake snorkel, i'm not sure what else can be done. There just isn't enough pressure on the filter imo. Those rubberbands don't make a lot of sense. idea? thoughts? Looking at the bottom of the stock filter, I could see where dirt was getting past it, but it was not just one place. I'd hate to see what my cylinder walls look like.    | ||
| Moosestang |
Did anyone else feel like the K&N was going to cave in? I'm hoping it seals better and doesn't get sucked into a throttle body. | ||
| Captain_america |
Moosestang..... Mine looked the same when I took it off at 1000miles. I now have 4000mile on my CR and am afraid to take the filter of to see what I might find...  | ||
| Moosestang |
I'd like to remove the rubber gasket under the throttle bodies and fit some conical filters, but I don't think there is room. any ideas for a pre-filter on the snorkle? I have some filter material I could put in the snorkle, but it will probably just get sucked into the air box. It would probably cut way down on the amount of dirt that gets past the filter if i could keep the sand from collecting in the air box. I should have taken a picture of all the sand in there. Must have been a pound worth. (Message edited by moosestang on March 02, 2010) | ||
| Littlebutquick |
i fitted a ridged strip of plastic rapped in rubber tape and fitted it under the rubber straps at each end of the KnN filter .that seals it up better thats wear it does not seal and bits get through | ||
| Chevycummins |
I never had that much sand in mine but I did discover that the lower air box plastic weld seam had come loose near the front. Check where the bottom part meets the upper dome part that the filter is secured in. When I had mine off I noticed dirt in that area at the front where the snorkel comes into it. I could see light through the seam, there is a really small bead of sealant there along with the plastic weld but it was not glued together anymore. The crud that was in mine got in there, not through the filter. | ||
| Moosestang |
Did you do that at the bottom edge of the filter or across the long side of the filter? | ||
| 1340busa |
hey guys mine did the same. the problem was when they put the high bar kit on. the breather hose in the back left corner was not put back on. | ||
| Moosestang |
That dirt in my pic didn't come through the breather hose. You can see it all around the lip of the air box seal, but there wasn't any sign around the filtered breather.  | ||
| Therealassmikeg |
Don't know if it will work or not, but here's my thoughts moosetang... I would start out with a tube of rtv silicone (make sure it's labelled oxygen sensor safe) permatex right stuff comes to mind here. get a piece of plywood, plexiglass, whatever you can find big enough to fit an air filter flat on it. Take your stock air filter and spray some silicone on the seal for a release agent, run a bead of rtv and stick the filter on it and let it set up. Remove/try to remove filter from rtv. If when you remove the stock filter and you have a nice formed seal, and still have an air filter, proceed with this process on the airbox with the K&N or whatever filter you choose to install. Cheers, Mike G | ||
| Dannybuell |
Great documentation and confirmation of the systems shortcomings at a variety of insertion points. perhaps the forced air intake is more of a theoretical or race necessity. Moosestang; a pound of dirt in an intake system is horrible. an ounce of dirt in an intake system is horrible. Are you flat tracking or what? Therealassmikeg; GREAT double gasket idea. dannybuell | ||
| Blackflash |
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| Fresnobuell |
Great documentation and confirmation of the systems shortcomings at a variety of insertion points. perhaps the forced air intake is more of a theoretical or race necessity. My suspicion is the filter is not installed correctly. I have never once seen a bit of dirt get past the filter--and there has been plenty laying about in the airbox. I see no problem with the stock air filter setup. | ||
| Kirb |
I would really think about putting a pre-filter in the intake to cut down on the sand that can even make it to the airbox. Maybe an AL 'mesh' or wool type that you could stuff into the intake. It would help cut down on particulate that large. | ||
| Fresnobuell |
You would cut down on air flow as well, but I guess that's better than a sandbox in your motor. | ||
| Vtwinbuell |
I'd like to remove the rubber gasket under the throttle bodies and fit some conical filters, but I don't think there is room. There is enough room, I put some on my bike. Each filter has about the same area as the stock filter. I wouldn't put a pre-filter in, that would just choke the engine. Edit: Another option could be to use some closed cell door and window foam tape under the edges of the filter. Or go back to stock. (Message edited by Vtwinbuell on February 17, 2010) | ||
| Kirb |
The flow reduction would be minimal (not so much flow, but energy required to get by media) but the sand these guys are ingesting is really bad. I was thinking something like this: http://www.airfilterusa.com/industrial-grade-alumi num-filter.html Cut to fit (I'm sure there is other media, but that was a quick search) | ||
| Moosestang |
Vtwinbuell, I was using a stock filter in the pics shown. The amount of sand that got past the filter is shown in the pics. There was a lot of sand in the actual airbox area, but not past the filter. Blackflash, sand is kicked up by the front tire and actual gets through my helmet vent and hits me in the mouth, so it would go right in those vents. The silicon idea is interesting. If I can get it to stick to the airbox grove, then it should give me a better seal. What could I put on the filter to keep it from sticking or do you think it would even stick to the K&N, since it's all ready oily. I posted this for anyone that lives on a dirt road, you might want to check your airbox. There's no telling how much sand my motor has injected, but I'm sure it has eaten some. The airfilter/box is just flawed imo and I had the same problem with the xb filter not sealing well enough. I much prefer a cone shaped K&N style filter with a nice band clamp securing it. No way for big pieces of sand to get past that | ||
| Moosestang |
I need to put something over the intake snorkel, just not sure what to use. Either that or get a longer front fender to keep the front tire from throwing up sand. It's funny that the tire is rotating forward yet I still get sand flying up from the front of the bike. It must stick to the sides of the tire. At this point I'm going to try the K&N pre-filter foam and just have it secured above the snorkel. That way it won't get sucked in and it should stop any sand. Not sure how much it will cut down on cold air, but I have to do something, short of paving my stupid road! This is what I have on hand and it's red to match the bike. I bought it to use on my car, but never used it. http://www.knfilters.com/airforcewraps.htm | ||
| Moosestang |
For anyone unfamiliar with Florida dirt roads, here's a pic. It's basically packed sand.  | ||
| Vtwinbuell |
Moosestang take a look at K&N # RD-6020.(<edit) This filter fits, it just pushes together at the top a bit. The inner air box will need to be removed and you will need a couple breather filters. http://www.knfilters.com/search/product.aspx?Prod=RD-6020  (Message edited by Vtwinbuell on February 18, 2010) | ||
| Froggy |
Moose, I was thinking, perhaps you could take a tshirt or other rag and cover the intake snorkel. I am not sure how you would go about with securing it though. I have no idea if it would be good enough, but I figure it would be better than nothing. | ||
| Moosestang |
Securing it is the problem, it doesn't have a lip all the way around it, so you can't just rubberband something around the opening. Thanks for the pic vtwin! I don't really want to remove the airbox, but if I can't keep the dirt out, then I will. you could still keep the base plate and top of the box and just cut the bottom where needed. I like the noise dampening that the airbox provides. | ||
| Sportbikermed |
Kirb: The filters you provided the link for look basically like the filters in a stove hood. I'm not sure if they are aluminum or stainless steel but you could probably pick one up at your local appliance store if you want to try something like that. V-twin: I really like the idea of what you did. Looks nice too. I agree with Moose though about the noise dampening. I may have to give that a try leaving the airbox. Good thread discussion guys. | ||
| Therealassmikeg |
Moosetang, I'll try to test this out at work and I'll post some pics and comments. Vtwinbuell, Great idea using the conicals.. | ||
| Therealassmikeg |
Ok, I'll explain my testing procedure. I took the stock air filter and marked the 4 sealing surface sides for 4 different release agents. furniture polish, paste car wax, silicone spray, K&N air filter oil. Then apply products to air filter.   Using Permatex "Right Stuff" sensor safe silicon, I ran a bead on a marked plexiglass sheet and stuck the filter gasket to it    While we wait for the silicone to fully set, I will "rotate" replace a Supercharged Range Rover engine....  | ||
| Moosestang |
Hey vtwinbuell, is that your bike? Hows it run without the airbox? I'm not overly concerned about the noise, but how much louder is it? I just checked it again and I'm still getting a fine dust in there, so i'm going to order those filters and possibly cut the airbox to keep the cover. Besides the filter retention system being weak, I feel the gasket around the throttle bodies is a compromise at best. I'm assuming part K&N # RD-0620 is not the right filter, since it only has a 2.25 inch inlet. Is the correct filter the one in your link? 6020? (Message edited by moosestang on February 18, 2010) | ||
| Captain_america |
The sound of the bike after the airbox lid is removed is a lot louder. The bike sounds much "meaner" I think. I love it. It only gets louder under a load, so revving it in neutral is almost no difference. You have to ride the bike. With the TB's being right under you you hear the air getting pulled into the motor. | ||
| Therealassmikeg |
Need I continue with this test? Moosetang, I would definitly bring this issue up with your dealer and have it documented. (Message edited by therealassmikeg on February 18, 2010) | ||
| Moosestang |
Thanks for the test, but I'm going to use the dual K&N filters. I just don't feel comfortable riding the bike in the conditions I'm forced to, using the stock airbox setup. There are to many possible entry points for dirt. You must have a lot of free time at work, lol! |
