I did try some basic messing about without any success so I am back to stock at the moment.
![Sad :(](http://ascot500.com/Smileys/default/xsad.gif.pagespeed.ic.L3FGyzQrjB.png)
For anyone experimenting, this is what I tried. (save you the time trying it out
![Huh ???](http://ascot500.com/Smileys/default/xhuh.gif.pagespeed.ic.6Nvt7O8a11.png)
)
experiment 1.
I removed the whole airbox and clamped the OE filter to the plenum - thinking it would be the same volume/ rate of air flow as stock. and the result was a resounding 'No!' - I could not open the throttle more than fraction before it bogged down. I deduced from this that the filter does not slow or reduce airflow in any way. So it must be down to the air 'intake' hose size .
experiment 2.
removed the intake bit (snorkel?) of the stock airbox and connected that to the plenum, (no filter). The result this time? slightly better than air filter only but still completely unrideable again bogging down as soon as the throttle is opened.
My final deduction being that the volume of stored air in the stock box also plays a big part in the engine running correctly
![Shocked :o](http://ascot500.com/Smileys/default/xshocked.gif.pagespeed.ic.CrwtrNUjLO.png)
My next sometime in the future experiment will be measuring the internal volume of the stock airbox and making another different shaped one (shallow, oblong to run directly under seat pan, with oe intake snorkel on one end and the plenum on the other) and see if that works. If it does then there is plenty of filter material available loose to then fit in said box.
It will probably be a while before I get round to this though, I am making the most of the nice riding weather
![Smiley :)](http://ascot500.com/Smileys/default/xsmiley.gif.pagespeed.ic.R8GFI-pF6f.png)