fitting braided lines............

Well here we are , another question for you guys. I am fitting some new lines today, do i have to empty the M/C first then fit the lines and bleed brakes, or do i just swap the lines straight over and try not to get brake fluid everywhere, then bleed new fluid through? thanks guys

bleed old line first clean the bolts where the old nipples where, fit new lines with new washers applly fluid, pump brakes a few times till it starts pushing liquid out lock bolts and robert is your dad’s bro’

but if you need a full detailed step by step “how to” read below: