bloody hell, cheap insurance, git, lol
mine for some reason is 900 with the gf (im 21 and she is 25)
one to try is the hard plastic pipe that runs accross the top of your rocker cover from the isv to the plastic air inlet.
that came off, or worked loose and i broke down, completely wouldnt run, that got shoved hard back in, and its rum alot better since!!
worth a go m8!!
ps - has your air flow meter been tampered with like mine!?
mine has some white silicone around the joints, maybe a clue if its the same on yours?!