I have recurring nightmares about the airducts, filters and other debri being sucked into the motor, and I have seen a few motors where this has happened. So I went to my local plumbing supplies and bought a couple of 90mm overflow vents for a rain water tank and then modified and fitted them as per the photos. It's not proven yet as it may impact on the volumetric efficiency, but they are fuel resistant and to some extent heat resistant. I'm also going to do a set for the ST4 and maybe the 999. Like I said, not proven yet.....
I've seen screens like that over the intakes of air filter less bikes, popular on old guzzis for example. Sometimes they invert themselves and sometimes one goes missing. No points for guessing where it went.
I have the feeling that those type of screens, depending on the mesh, actually have a surprising amount of flow resistance..
On aircraft turboshaft intakes we sometimes have wire mesh for protection if they aren't filtered, but only very coarse chicken wire style with 1/4" holes or do. Granted they do suck a lot harder, but also over a larger area. Maybe some math or Dyno testing is necessary
I've seen screens like that over the intakes of air filter less bikes, popular on old guzzis for example. Sometimes they invert themselves and sometimes one goes missing. No points for guessing where it went.
I have the feeling that those type of screens, depending on the mesh, actually have a surprising amount of flow resistance..
On aircraft turboshaft intakes we sometimes have wire mesh for protection if they aren't filtered, but only very coarse chicken wire style with 1/4" holes or do. Granted they do suck a lot harder, but also over a larger area. Maybe some math or Dyno testing is necessary
You can tell on the photo that this is a pretty coarse screen with large holes they are using. Similar as on the intake of the turbine above. It would certainly be beneficial to have finer filtration, but whoever designed that must have had a good reason to stick to that chicken fence.
Like I said, I've seen those fine wire mesh jobs inverted on someone's Guzzi before. Started as a dome shape and then popped in while the engine was running. That tells me that there must have been a significant pressure difference between both sides, and that which ever mesh they had used was too fine. So despite it mostly consisting of holes, it didn't flow well. How fine? Don't know.
That mesh in the op is too fine and will restrict the airflow.
I use aluminium diamond mesh and it works just fine to keep out the bigger rocks.
I've tried fine mesh and gradually removed strands to get correct mixture and ended up with 6mm squares so it was a no brainer to migrate to the diamond mesh which is rigid and can't disappear down the orifice
Not sure it would be the same but the snap on air filters that attach like yours do cost HP. I had a bike on the dyno and it was a large enough loss I would not run them. again yours have no filter media so they may be fine.
It seems that if the original intent is to keep detritus out of the engine, a mesh with a large enough gauge to not obstruct flow would allow sand and grit. So forget about it, run a good filter, and make sure it seals well to the airbox.
To be fair the trumpets on the OP's bike have much more of a flare on them than your Guzzi stacks, so the OD is huge compared to the throat of the throttle body. To double the surface area of a circle you only need to increase the diameter by 50%.
Does anyone here have experience setting up a 1098 for the track and chosen to both lengthen the swingarm and shorten the triple clamp offset? I have added a full centimeter to my stock swingarm by slotting the brake anchor. I think most of the longer arms are 15mm longer. It did keep the front...
I just changed the belts on my 749 after reading thru the forums and watching every video I could find. After replacing them and buttoning everything back up except the fairings I did one last bit of research and found that CA Cycleworks is now recommending 99hz instead of the 110 hz in the...
So I've got an electrical problem on my 996. One morning I went to start the bike, and when I turned the key to the on position, the lights flickered, a relay tattered on and off rapidly, and then nothing. This all happened very briefly. Since then, I've got the lights to flash on twice when...
I Have a 2001 748 , Im thinking of getting the SpeedyMoto top triple clamp as you can have the bars raised 3/4 inch which would take some of the stress off the wrists, im not looking to alter the height a large degree, does anyone done this and is it worth the investment
I recently bought a 1199 of auction and fixed it up, on my first ride I see that the quick shifter won’t engage when I pull the lever up while accelerating over 5k, but on the display the DQS says on, don’t know what might be the cause, the auto blipper works but not quick shifter, anyone knows...
A forum community dedicated to all Ducati owners and enthusiasts. Come join the discussion about performance, modifications, troubleshooting, superbike racing, maintenance, and more!
