I have a 01 ds650 and it has a small oil leak comeing from the base of the cyclender. I have a new HP piston and gaskets set readey to go but i was thinking that i need to install the Efi befor i install the new piston so i can get it have way tuned so i don't fry the new piston right off the bat. or should i install the new piston with the old carb and brake it in then install the efi ? what do you guys think ?