I rarely use the clutch on up shifts, I almost always use it on down shifts. I have a quickshifter fitted so no need for the clutch on any upshift, but it can be jerky at low revs, so at anything below 4k revs, I tend to use the normal clutchless shift method of rolling off the throttle very slightly whilst snicking in the next gear. Before I had the quickshifter fitted, I would use clutchless up shifts at anything up to around 9k rpm, after that I did use the clutch just in case of a missed shift. With the quickshifter I happily shift at the red line (13k) without the clutch
