You should only preload-shift when you are able to control throttle enough to sync rpms. Otherwise you'll be wearing gears and dogs. Some bikes, (like big, slow v-twins) are nearly impossible to sync, which is why you'll see cruiser riders take forever to shift, while pulling the clutch in completely, dropping throttle, then hammering the next gear, then slowly releasing. ... One reason I cant stand to ride those sort of bikes. when you are able to sync throttle, the throttle and clutch lever should barely move as you up (or down) shift, unless you are under very hard braking.