SuperLC

Hey everyone, Im new here so bare with me.

I would like to know if anyone has any ideas on how to improve the performance of my SV650s (1999) version. Im looking for slightly more acceleration & a little more top speed (only had it at 136 mph flat out, I was doing that speed for quite some time thinking it would maybe ease up to 140-142 mph'ish but no luck) I already have a touch of Nitrous Octane in the petrol, a scorpion exhaust fitted (which is slightly lighter than the old one) & a hps performance air filter and it doesn't really seem to have gave it a major boost of what I was expecting =S and no I haven't got any heavier, my weight has remained pretty much the same (about 82KG, 180 lbs) So if anyone has any tips (without having to spend over £100) then I would appreciate the feedback

~Thanks