My sinnis vista is the same. 60 seems tops for me. I have though just fitted a 110 jet and gone for a run today. It makes a considerable difference but I may have jumped abit too far. I fitted a k&m filter and I'm in two minds to get a different exhaust. I also have a 16 tooth there to try myself. I'm not after break neck acceleration either I'd just like to have a 5th gear that isn't just a Rev lowerer lol