To tell everyone the truth, I really don't like crooked mechanics. Ever since they messed up my XR350

I don't like giving them my hard earned money either. Is it possible for me to do it? I have basic tools and a little know how, not much though

How much does a D15B7 weigh? Could me and my buddies lift it out or do i need one of those big jacks? I'm new to this stuff so any input is helpful.
Isaac