My bike is just about ready for the season apart from this: When I warm it up and blip the throttle the revs don't rise in a liner fashion. If you rotate the throttle smoothly then it's fine, it's only when you blip it. The revs rise so much quicker than you expect it takes just a fraction more than you'd expect but odd. The throttle mechanically appears to be fine and snaps back as expect in all steering positions. Any ideas guys? Is this normal?