Does anyone know if can replace my 07 xt motor with a 700 efi motor and use my carb and exhaust with jet change or do I need a new wiring harness ,ecm and fuel injection. Must of lost oil pressure and the top end is junk now. I assume the bottom has some damage , but it was still running just with more valve noise than normal. Was going to trade in next 6 months. Now engine goes with 1250 mi. no warning of problem, oil a top of full mark, just started making more valve noise.