Stray pipe!

I recently fitted a Ramair filter kit to my 2013 Roadster, removed the old breather hose and replaced it with the supplied breather filter, then l noticed in the same area to the rear of the motor a small 8mm? pipe not connected to anything, traced it down to where in ends....behind the starter but not sure where it should be connected topside....any ideas anyone.
Bike runs fine...even had it on a dyno last week with no isuues.

Your probably looking at one of the overflow hoses radiator or fuel. Depending on the flavor the crank case breather fitting is the only opening on the rear cover.

Can see the fuel overflow pipes...doesnt seem long enough to reach anything...maybe left by mistake.
When l went to remove the standard air box not one single clip was fastened...the two bolts securing the plenum(?) were missing altogether....like the bike assembler had skipped a whole stage of the process.....everything just lifted out....no tools required!