I've had the sump off my speedmaster for a week. i was wondering about starting it up for the first time when i get it back together. The manual mentions something about the oil pump needing to be primed, i think in the section about inspecting/removing it, but it doesn't say much about when you have to do that. Do i need to after removing the sump, and if so how? Or is it only necassary if i removed the pump?