Jittery at low revs

[Yamazer-92]

Just read this post and found it interesting, had a few hours spare so went out and got my air filter out to see what it is and the condition of it. Holy crap. The filter wasn't too bad, a bit dirty but nothing major for being on there almost a year but the airbox had loads of emulsified oil in. Not really sure why it was there, I cleaned it out anyway. There was also loads of oil dripping from the spongy bit of the bottom of the filter too so I dried all that out and applied a thin smearing of new oil. It's not a K & N one and I will put one of them in if I decide to keep the Fazer (looking likely unless I utterly love the test ride on a supermoto) but it's made a huge difference to how the bike feels low down and has stopped the revs dropping before I pull away.