Bugs in the airbox

[lelenb]

I finally installed my BMC filter last week and when I pulled my stock filter out a few dead bugs fell out of the filter. The way the airbox is designed anything loose on the filter can fall into the airbox when you remove the filter. I think it would be a good practice to use a small shop vac on the inside of the filter before you pull it out to suck out any small rocks or debris before they can fall in. I also greased the lip of the filter as I don't think the airbox design offers the best seal on top, especially with the hard BMC gasket material. I have the open lid installed btw.

[BillyD]

As my auto shop teacher always said about such things, "Cleanliness is next to Godliness." BTW, he as a hand-to-hand combat drill sargent for the Marine Corps, so us punk kids tended to listen to him.

[mjjflynn]

any noticable difference with the new filter?

[08hyper]

Lelen, I had the same problem, when I removed the air filter whatever loose

crap thats in there will fall into the airbox when you remove the filter, I drilled

the bottom of the airbox with a modified 1 3/4 hole saw (teeth smoothed on

the OD of hole saw) for a perfect fit, and run a metal plate on top to hold

the filter down, now whatever debri that falls into the airfilter will fall straight thru.

As a side note when you drill out the bottom of the airbox, your bike will run

even better, because of the increased air flow, Aloha Alex

[AXE]

Yeah, this is a pretty shitty air box design. When I stuck my DNA in, I wasn't real confident that the seal was going to be that great. I thought abour cutting another piece of foam rubber to go around the top to ensure a positive seal between the outer edge of the filter and the filter cover. I didn't and I figure if it starts to use oil, I am gonna trade it.

In the FWIW column, one of the techs at Scottsdale Ducati said that he built a CBR race/street bike and the owner insisted on a BMC filter against the techs advice. He said he had the bike back in with only a few thousand miles and had to rebuild it. I guess the valves and pistons were pitted and pretty bad condition. He didn't recommend using the BMC and didn't seem to be a big fan of aftermarket filters. I trust what he says, but I haven't exactly removed it yet. I will probably check it at about 3K miles and see what it looks like.

Out!

[08hyper]

Originally Posted by AXE

Yeah, this is a pretty shitty air box design. When I stuck my DNA in, I wasn't real confident that the seal was going to be that great. I thought abour cutting another piece of foam rubber to go around the top to ensure a positive seal between the outer edge of the filter and the filter cover. I didn't and I figure if it starts to use oil, I am gonna trade it.

In the FWIW column, one of the techs at Scottsdale Ducati said that he built a CBR race/street bike and the owner insisted on a BMC filter against the techs advice. He said he had the bike back in with only a few thousand miles and had to rebuild it. I guess the valves and pistons were pitted and pretty bad condition. He didn't recommend using the BMC and didn't seem to be a big fan of aftermarket filters. I trust what he says, but I haven't exactly removed it yet. I will probably check it at about 3K miles and see what it looks like.

Out!

I installed a BMC filter at aprox 1500mi, I have 4500mi now, when I hit 7500mi

I will be doing MAJOR motor work, (new top end) so I will check out the

condition of the top-end, I will post what I find, I do feel that it will be fine

thou, as it looks like a K&N filter, and I use them on my Trucks and other bikes

and they work just fine, I do know that the paper filters do do a better job

at filtering out the super fine stuff, but thats why their more restrictive, so

its a trade off, as the K&N get dirty they will start to filter better, as the

trapped dirt becomes part of the filtering media, but what little particles that

do get by are so small that I don't believe they cause any harm. Just my 2

cents, Alex

[AXE]

Originally Posted by 08hyper

I installed a BMC filter at aprox 1500mi, I have 4500mi now, when I hit 7500mi

I will be doing MAJOR motor work, (new top end) so I will check out the

condition of the top-end, I will post what I find, I do feel that it will be fine

thou, as it looks like a K&N filter, and I use them on my Trucks and other bikes

and they work just fine, I do know that the paper filters do do a better job

at filtering out the super fine stuff, but thats why their more restrictive, so

its a trade off, as the K&N get dirty they will start to filter better, as the

trapped dirt becomes part of the filtering media, but what little particles that

do get by are so small that I don't believe they cause any harm. Just my 2

cents, Alex

I pretty much agree, I ain't gonna sweat it. Getting a positive seal is higher on my list of priorities.

I run foam filters in the dirt and sand dunes and have never had a problem. I am now running an AEM non oil synthetic filter media filter in my Duramax and wife's Tahoe. Pull them out, wash em in water, dry them, and stick them back in. A company called Motoworks is supposedly making them for dirt bikes and quads. I hope they offer a line for street bikes.

Out!

[lelenb]

Originally Posted by mjjflynn

any noticable difference with the new filter?

Yes, I found more power from mid up. Not a huge increase, but noticeable. I had to turn in the air screws to make the bike idle after I installed it. I would not use this filter if you do not have a DP ECU of some kind, or your bike will be too lean.

It looks like there was some blow by on top of the stock filter as it had a few dust streaks on the edge. It could have happened when I removed the filter. It looks like Peter has the right idea with the Beast R air pods that he installed in his bike, but they are $300 for the pair. I am going to redesign the top of the airbox to make a better seal, maybe a neoprene gasket. I have some ideas.

[dukepilot]

Originally Posted by lelenb

Yes, I found more power from mid up. Not a huge increase, but noticeable. I had to turn in the air screws to make the bike idle after I installed it. I would not use this filter if you do not have a DP ECU of some kind, or your bike will be too lean.

It looks like there was some blow by on top of the stock filter as it had a few dust streaks on the edge. It could have happened when I removed the filter. It looks like Peter has the right idea with the Beast R air pods that he installed in his bike, but they are $300 for the pair. I am going to redesign the top of the airbox to make a better seal, maybe a neoprene gasket. I have some ideas.

I'm pretty happy with the Beast R setup. More torque and HP and a broader torque curve, its all good. It will really pay off later with the higher compression pistons, DP Cams, and some headwork. The stock airbox, even with the DP lid and the extra hole is just too small to keep up with the big gulps of air needed by the engine at mid to higher rpms.